【Escapist:003】C++ 仅仅使用 Windows API 创建一个窗口

#include<Windows.h>
#pragma comment(linker, "/manifestdependency:\"type='win32' name='Microsoft.' version='6.0.0.0' processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'\"")
const char WindowClassName[] = "WindowClass";
const char WindowCaption[] = "CreateWindowExA";
HINSTANCE InstanceHandle;
//HWND WindowHandle;
long __stdcall WindowProcess(HWND WindowHandle, unsigned int Message, unsigned int wParam, long lParam);

int __stdcall WinMain(HINSTANCE hInstance, HINSTANCE PreInstanceHandle, char* lpCmdLine, int nCmdShow)
{
    InstanceHandle = hInstance;
    WNDCLASSEXA WindowClass;
    WindowClass.cbSize = sizeof(WNDCLASSEXW);
    WindowClass.style = CS_HREDRAW | CS_VREDRAW;
    WindowClass.lpfnWndProc = WindowProcess;
    WindowClass.cbClsExtra = 0;
    WindowClass.cbWndExtra = 0;
    WindowClass.hInstance = InstanceHandle;
    WindowClass.hIcon = LoadIconA(InstanceHandle, NULL);
    WindowClass.hCursor = LoadCursorA(InstanceHandle, MAKEINTRESOURCEA(32512));
    WindowClass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    WindowClass.lpszMenuName = NULL;
    WindowClass.lpszClassName = WindowClassName;
    WindowClass.hIconSm = LoadIconA(InstanceHandle, NULL);
    RegisterClassExA(&WindowClass);
    HWND WindowHandle = CreateWindowExA(WS_EX_CLIENTEDGE, WindowClassName, WindowCaption, WS_OVERLAPPEDWINDOW, 0, 0, 750, 500, NULL, NULL, InstanceHandle, NULL);
    if (!WindowHandle)
        return 0;
    ShowWindow(WindowHandle, SW_SHOW);
    MSG Message;
    while (GetMessageA(&Message, nullptr, 0, 0))
    {
        TranslateMessage(&Message);
        DispatchMessageA(&Message);
    }
    return 0;
}
long __stdcall WindowProcess(HWND WindowHandle, unsigned int Message, unsigned int wParam, long lParam)
{
    switch (Message)
    {
    case WM_CREATE:
    {
        RECT Rect;
        GetWindowRect(WindowHandle, &Rect);
        SetWindowPos(WindowHandle, HWND_TOP, ((GetSystemMetrics(SM_CXSCREEN) - Rect.right) / 2), ((GetSystemMetrics(SM_CYSCREEN) - Rect.bottom) / 2), Rect.right, Rect.bottom, SWP_SHOWWINDOW);
        break;
    }
    case WM_PAINT:
    {
        PAINTSTRUCT PaintStruct;
        HDC DCHandle = BeginPaint(WindowHandle, &PaintStruct);
        //添加绘图代码
        EndPaint(WindowHandle, &PaintStruct);
        break;
    }
    case WM_DESTROY:
    {
        PostQuitMessage(0);
        break;
    }
    default:
    {
        return DefWindowProcA(WindowHandle, Message, wParam, lParam);
    }
    }
    return 0;
}