Add a variety of more wrappers.

A lot of random things, also added some popups to the demo
program to test them, etc. Wrote some additional wrappers for
existing methods to better support optional/default parameters
in the original C++ API.

src/ImGui.NET.SampleProgram/SampleWindow.cs

@@ -207,7 +207,7 @@ namespace ImGuiNET
             bool leftPressed = ImGui.GetIO().MouseDown[0];
             ImGui.Text("Current mouse position: " + pos + ". Pressed=" + leftPressed);
 
-            if (ImGui.Button("Press me!", new System.Numerics.Vector2(120, 30)))
+            if (ImGui.Button("Increment the counter."))
             {
                 _pressCount += 1;
             }
@@ -242,6 +242,44 @@ namespace ImGuiNET
                 ImGui.TreePop();
             }
 
+            if (ImGui.Button("Press me!", new System.Numerics.Vector2(100, 30)))
+            {
+                ImGuiNative.igOpenPopup("SmallButtonPopup");
+            }
+
+            if (ImGui.BeginPopup("SmallButtonPopup"))
+            {
+                ImGui.Text("Here's a popup menu.");
+                ImGui.Text("With two lines.");
+
+                ImGui.EndPopup();
+            }
+
+            if (ImGui.Button("Open Modal window"))
+            {
+                ImGui.OpenPopup("ModalPopup");
+            }
+            if (ImGui.BeginPopupModal("ModalPopup"))
+            {
+                ImGui.Text("You can't press on anything else right now.");
+                ImGui.Text("You are stuck here.");
+                if (ImGui.Button("OK", new System.Numerics.Vector2(0, 0))) { }
+                ImGui.SameLine();
+                ImGui.Dummy(100f, 0f);
+                ImGui.SameLine();
+                if (ImGui.Button("Please go away", new System.Numerics.Vector2(0, 0))) { ImGui.CloseCurrentPopup(); }
+
+                ImGui.EndPopup();
+            }
+
+            ImGui.Text("I have a context menu.");
+            if (ImGui.BeginPopupContextItem("ItemContextMenu"))
+            {
+                if (ImGui.Selectable("How's this for a great menu?")) { }
+                ImGui.Selectable("Just click somewhere to get rid of me.");
+                ImGui.EndPopup();
+            }
+
             ImGui.EndWindow();
 
             if (ImGui.GetIO().AltPressed && ImGui.GetIO().KeysDown[(int)Key.F4])

src/ImGui.NET/ImGui.cs

@@ -53,6 +53,11 @@ namespace ImGuiNET
             ImGuiNative.igTextColored(color, message);
         }
 
+        public static bool Button(string message)
+        {
+            return ImGuiNative.igButton(message, Vector2.Zero);
+        }
+
         public static bool Button(string message, Vector2 size)
         {
             return ImGuiNative.igButton(message, size);
@@ -260,6 +265,11 @@ namespace ImGuiNET
             ImGuiNative.igEndChild();
         }
 
+        public static bool Selectable(string label)
+        {
+            return Selectable(label, false);
+        }
+
         public static bool Selectable(string label, bool isSelected)
         {
             return Selectable(label, isSelected, SelectableFlags.Default);
@@ -270,11 +280,26 @@ namespace ImGuiNET
             ImGuiNative.igBeginMainMenuBar();
         }
 
+        public static bool BeginPopup(string id)
+        {
+            return ImGuiNative.igBeginPopup(id);
+        }
+
         public static void EndMainMenuBar()
         {
             ImGuiNative.igEndMainMenuBar();
         }
 
+        public static bool SmallButton(string label)
+        {
+            return ImGuiNative.igSmallButton(label);
+        }
+
+        public static bool BeginPopupModal(string name)
+        {
+            return ImGuiNative.igBeginPopupModal(name, WindowFlags.Default);
+        }
+
         public static bool Selectable(string label, bool isSelected, SelectableFlags flags)
         {
             return Selectable(label, isSelected, flags, new Vector2());
@@ -295,6 +320,41 @@ namespace ImGuiNET
             return result;
         }
 
+        public static bool BeginPopupContextItem(string id)
+        {
+            return BeginPopupContextItem(id, 1);
+        }
+
+        public static bool BeginPopupContextItem(string id, int mouseButton)
+        {
+            return ImGuiNative.igBeginPopupContextItem(id, mouseButton);
+        }
+
+        public static unsafe void Dummy(float width, float height)
+        {
+            Dummy(new Vector2(width, height));
+        }
+
+        public static void EndPopup()
+        {
+            ImGuiNative.igEndPopup();
+        }
+
+        public static unsafe void Dummy(Vector2 size)
+        {
+            ImGuiNative.igDummy(&size);
+        }
+
+        public static void Spacing()
+        {
+            ImGuiNative.igSpacing();
+        }
+
+        public static void OpenPopup(string id)
+        {
+            ImGuiNative.igOpenPopup(id);
+        }
+
         public static void SliderFloat(string sliderLabel, ref float value, float min, float max, string displayText, float power)
         {
             ImGuiNative.igSliderFloat(sliderLabel, ref value, min, max, displayText, power);

src/ImGui.NET/ImGuiNative.cs

@@ -38,14 +38,18 @@ namespace ImGuiNET
 
         // Window
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igBegin(string name, ref bool p_opened, WindowFlags flags);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igBegin2(string name, ref bool p_opened, Vector2 size_on_first_use, float bg_alpha, WindowFlags flags);
         [DllImport(cimguiLib)]
         public static extern void igEnd();
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igBeginChild(string str_id, Vector2 size, bool border, WindowFlags extra_flags);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igBeginChildEx(uint id, Vector2 size, bool border, WindowFlags extra_flags);
         [DllImport(cimguiLib)]
         public static extern void igEndChild();
@@ -79,6 +83,7 @@ namespace ImGuiNET
         [DllImport(cimguiLib)]
         public static extern float igGetWindowHeight();
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsWindowCollapsed();
 
         [DllImport(cimguiLib)]
@@ -276,37 +281,52 @@ namespace ImGuiNET
         [DllImport(cimguiLib)]
         public static extern void igBulletText(string fmt);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igButton(string label, Vector2 size);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igSmallButton(string label);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igInvisibleButton(string str_id, Vector2 size);
         [DllImport(cimguiLib)]
         public static extern void igImage(IntPtr user_texture_id, Vector2 size, Vector2 uv0, Vector2 uv1, Vector4 tint_col, Vector4 border_col);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igImageButton(IntPtr user_texture_id, Vector2 size, Vector2 uv0, Vector2 uv1, int frame_padding, Vector4 bg_col, Vector4 tint_col);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igCollapsingHeader(string label, string str_id, bool display_frame, bool default_open);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igCheckbox(string label, bool* v);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igCheckboxFlags(string label, UIntPtr* flags, uint flags_value);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igRadioButtonBool(string label, bool active);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igRadioButton(string label, int* v, int v_button);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igCombo(string label, ref int current_item, char** items, int items_count, int height_in_items);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igCombo2(string label, ref int current_item, string items_separated_by_zeros, int height_in_items);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igCombo3(string label, ref int current_item, ItemSelectedCallback items_getter, IntPtr data, int items_count, int height_in_items);
 
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igColorButton(Vector4 col, bool small_height, bool outline_border);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igColorEdit3(string label, Vector3 col);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igColorEdit4(string label, Vector4 col, bool show_alpha);
         [DllImport(cimguiLib)]
         public static extern void igColorEditMode(ColorEditMode mode);
@@ -327,83 +347,118 @@ namespace ImGuiNET
 
         // Widgets: Sliders (tip: ctrl+click on a slider to input text)
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igSliderFloat(string label, float* v, float v_min, float v_max, string display_format, float power);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igSliderFloat(string label, ref float v, float v_min, float v_max, string display_format, float power);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igSliderFloat2(string label, Vector2 v, float v_min, float v_max, string display_format, float power);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igSliderFloat3(string label, Vector3 v, float v_min, float v_max, string display_format, float power);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igSliderFloat4(string label, Vector4 v, float v_min, float v_max, string display_format, float power);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igSliderAngle(string label, float* v_rad, float v_degrees_min, float v_degrees_max);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igSliderInt(string label, int* v, int v_min, int v_max, string display_format);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igSliderInt2(string label, Int2 v, int v_min, int v_max, string display_format);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igSliderInt3(string label, Int3 v, int v_min, int v_max, string display_format);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igSliderInt4(string label, Int4 v, int v_min, int v_max, string display_format);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igVSliderFloat(string label, Vector2 size, float* v, float v_min, float v_max, string display_format, float power);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igVSliderInt(string label, Vector2 size, int* v, int v_min, int v_max, string display_format);
 
         // Widgets: Drags (tip: ctrl+click on a drag box to input text)
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igDragFloat(string label, float* v, float v_speed, float v_min, float v_max, string display_format, float power);     // If v_max >= v_max we have no bound
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igDragFloat2(string label, Vector2 v, float v_speed, float v_min, float v_max, string display_format, float power);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igDragFloat3(string label, Vector3 v, float v_speed, float v_min, float v_max, string display_format, float power);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igDragFloat4(string label, Vector4 v, float v_speed, float v_min, float v_max, string display_format, float power);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igDragFloatRange2(string label, float* v_current_min, float* v_current_max, float v_speed = 1.0f, float v_min = 0.0f, float v_max = 0.0f, string display_format = "%.3f", string display_format_max = null, float power = 1.0f);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igDragInt(string label, int* v, float v_speed, int v_min, int v_max, string display_format);                                       // If v_max >= v_max we have no bound
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igDragInt2(string label, Int2 v, float v_speed, int v_min, int v_max, string display_format);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igDragInt3(string label, Int3 v, float v_speed, int v_min, int v_max, string display_format);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igDragInt4(string label, Int4 v, float v_speed, int v_min, int v_max, string display_format);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igDragIntRange2(string label, int* v_current_min, int* v_current_max, float v_speed = 1.0f, int v_min = 0, int v_max = 0, string display_format = "%.0f", string display_format_max = null);
 
 
         // Widgets: Input
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igInputText(string label, IntPtr buffer, uint buf_size, InputTextFlags flags, TextEditCallback callback, void* user_data);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igInputTextMultiline(string label, IntPtr buffer, uint buf_size, Vector2 size, InputTextFlags flags, TextEditCallback callback, void* user_data);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igInputFloat(string label, float* v, float step, float step_fast, int decimal_precision, InputTextFlags extra_flags);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igInputFloat2(string label, Vector2 v, int decimal_precision, InputTextFlags extra_flags);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igInputFloat3(string label, Vector3 v, int decimal_precision, InputTextFlags extra_flags);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igInputFloat4(string label, Vector4 v, int decimal_precision, InputTextFlags extra_flags);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igInputInt(string label, int* v, int step, int step_fast, InputTextFlags extra_flags);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igInputInt2(string label, Int2 v, InputTextFlags extra_flags);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igInputInt3(string label, Int3 v, InputTextFlags extra_flags);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igInputInt4(string label, Int4 v, InputTextFlags extra_flags);
 
         // Widgets: Trees
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igTreeNode(string str_label_id);
 
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igTreeNodeStr(string str_id, string fmt);
 
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igTreeNodePtr(void* ptr_id, string fmt);
 
         [DllImport(cimguiLib)]
@@ -417,18 +472,24 @@ namespace ImGuiNET
 
         // Widgets: Selectable / Lists
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igSelectable(string label, bool selected, SelectableFlags flags, Vector2 size);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igSelectableEx(string label, ref bool p_selected, SelectableFlags flags, Vector2 size);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igListBox(string label, int* current_item, char** items, int items_count, int height_in_items);
 
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igListBox2(string label, ref int currentItem, ItemSelectedCallback items_getter, IntPtr data, int items_count, int height_in_items);
 
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igListBoxHeader(string label, Vector2 size);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igListBoxHeader2(string label, int items_count, int height_in_items);
         [DllImport(cimguiLib)]
         public static extern void igListBoxFooter();
@@ -457,30 +518,38 @@ namespace ImGuiNET
 
         // Widgets: Menus
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igBeginMainMenuBar();
         [DllImport(cimguiLib)]
         public static extern void igEndMainMenuBar();
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igBeginMenuBar();
         [DllImport(cimguiLib)]
         public static extern void igEndMenuBar();
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igBeginMenu(string label);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igBeginMenu(string label, bool enabled);
         [DllImport(cimguiLib)]
         public static extern void igEndMenu();
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igMenuItem(string label, string shortcut, bool selected, bool enabled);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igMenuItemPtr(string label, string shortcut, bool* p_selected, bool enabled);
 
         // Popup
         [DllImport(cimguiLib)]
         public static extern void igOpenPopup(string str_id);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igBeginPopup(string str_id);
-        [DllImport(cimguiLib, CharSet = CharSet.Ansi)]
+        [DllImport(cimguiLib)]
+        [return:MarshalAs(UnmanagedType.I1)]
         public static extern bool igBeginPopupModal(string name, byte* p_opened, WindowFlags extra_flags);
 
         public static bool igBeginPopupModal(string name, WindowFlags extra_flags)
@@ -498,10 +567,13 @@ namespace ImGuiNET
         }
 
         [DllImport(cimguiLib)]
+        [return:MarshalAs(UnmanagedType.I1)]
         public static extern bool igBeginPopupContextItem(string str_id, int mouse_button);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igBeginPopupContextWindow(bool also_over_items, string str_id, int mouse_button);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igBeginPopupContextVoid(string str_id, int mouse_button);
         [DllImport(cimguiLib)]
         public static extern void igEndPopup();
@@ -526,16 +598,22 @@ namespace ImGuiNET
 
         // Utilities
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsItemHovered();
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsItemHoveredRect();
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsItemActive();
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsItemVisible();
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsAnyItemHovered();
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsAnyItemActive();
         [DllImport(cimguiLib)]
         public static extern void igGetItemRectMin(out Vector2 pOut);
@@ -544,16 +622,22 @@ namespace ImGuiNET
         [DllImport(cimguiLib)]
         public static extern void igGetItemRectSize(out Vector2 pOut);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsWindowHovered();
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsWindowFocused();
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsRootWindowFocused();
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsRootWindowOrAnyChildFocused();
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsRectVisible(Vector2 item_size);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsPosHoveringAnyWindow(Vector2 pos);
         [DllImport(cimguiLib)]
         public static extern float igGetTime();
@@ -569,6 +653,7 @@ namespace ImGuiNET
         public static extern void igCalcListClipping(int items_count, float items_height, int* out_items_display_start, int* out_items_display_end);
 
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igBeginChildFrame(uint id, Vector2 size, WindowFlags extra_flags);
         [DllImport(cimguiLib)]
         public static extern void igEndChildFrame();
@@ -583,26 +668,37 @@ namespace ImGuiNET
         public static extern void igColorConvertHSVtoRGB(float h, float s, float v, float* out_r, float* out_g, float* out_b);
 
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsKeyDown(int key_index);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsKeyPressed(int key_index, bool repeat);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsKeyReleased(int key_index);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsMouseDown(int button);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsMouseClicked(int button, bool repeat);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsMouseDoubleClicked(int button);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsMouseReleased(int button);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsMouseHoveringWindow();
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsMouseHoveringAnyWindow();
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsMouseHoveringRect(Vector2 pos_min, Vector2 pos_max, bool clip);
         [DllImport(cimguiLib)]
+        [return: MarshalAs(UnmanagedType.I1)]
         public static extern bool igIsMouseDragging(int button, float lock_threshold);
         [DllImport(cimguiLib)]
         public static extern void igGetMousePos(Vector2* pOut);