imgui/examples/imgui_impl_win32.h

// dear imgui: Platform Binding for Windows (standard windows API for 32 and 64 bits applications)
// This needs to be used along with a Renderer (e.g. DirectX11, OpenGL3, Vulkan..)

// Implemented features:
//  [X] Platform: Clipboard support (for Win32 this is actually part of core dear imgui)
//  [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
//  [X] Platform: Keyboard arrays indexed using VK_* Virtual Key Codes, e.g. ImGui::IsKeyPressed(VK_SPACE).
//  [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.

#pragma once

IMGUI_IMPL_API bool     ImGui_ImplWin32_Init(void* hwnd);
IMGUI_IMPL_API void     ImGui_ImplWin32_Shutdown();
IMGUI_IMPL_API void     ImGui_ImplWin32_NewFrame();

// Configuration: Disable gamepad support or linking with xinput.lib
//#define IMGUI_IMPL_WIN32_DISABLE_GAMEPAD
//#define IMGUI_IMPL_WIN32_DISABLE_LINKING_XINPUT

// Win32 message handler
// - Intentionally commented out in a '#if 0' block to avoid dragging dependencies on <windows.h>
// - You can COPY this line into your .cpp code to forward declare the function.
#if 0
extern IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
#endif

// DPI-related helpers (optional)
// - Use to enable DPI awareness without having to create an application manifest.
// - Your own app may already do this via a manifest or explicit calls. This is mostly useful for our examples/ apps.
// - In theory we could call simple functions from Windows SDK such as SetProcessDPIAware(), SetProcessDpiAwareness(), etc.
//   but most of the functions provided by Microsoft require Windows 8.1/10+ SDK at compile time and Windows 8/10+ at runtime,
//   neither we want to require the user to have. So we dynamically select and load those functions to avoid dependencies.
IMGUI_IMPL_API void     ImGui_ImplWin32_EnableDpiAwareness();
IMGUI_IMPL_API float    ImGui_ImplWin32_GetDpiScaleForHwnd(void* hwnd);       // HWND hwnd
IMGUI_IMPL_API float    ImGui_ImplWin32_GetDpiScaleForMonitor(void* monitor); // HMONITOR monitor