这是一个使用C语言创建空白窗口的基本框架代码案例。

#include <Windows.h>
#include <WindowsX.h>

//窗体备用
HWND g_hwnd;
HINSTANCE g_hInstance;

//过程函数
LRESULT CALLBACK WinProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch (uMsg)
    {
    case WM_DESTROY://销毁窗体
        PostQuitMessage(0);
        break;

    default:
        return DefWindowProc(hwnd, uMsg, wParam, lParam);
    }
    return 0;
}

//主函数
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrecInstance, LPSTR lpCmdLine, int nCmdShow)
{
    //定义填充窗口
    WNDCLASSEX wcex;

    wcex.cbSize = sizeof(WNDCLASSEX);
    wcex.style = CS_VREDRAW | CS_HREDRAW;
    wcex.lpfnWndProc = WinProc;
    wcex.cbClsExtra = 0;
    wcex.cbWndExtra = 0;
    wcex.hInstance = hInstance;
    wcex.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
    wcex.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
    wcex.lpszMenuName = NULL;
    wcex.lpszClassName = TEXT("WinApp");
    wcex.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

    //注册窗口类
    if (!RegisterClassEx(&wcex))
    {
        return 0;
    }
    g_hInstance = hInstance;


    //创建窗口
    HWND hwnd;

    if (!(hwnd = CreateWindowEx(0, TEXT("WinApp"), TEXT("HelloWord"), WS_OVERLAPPEDWINDOW,
        0, 0, 800, 600, NULL, NULL, hInstance, NULL)))
    {
        return 0;
    }

    g_hwnd = hwnd;

    //显示更新窗口
    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);


    //消息循环
    MSG msg;
    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return msg.wParam;
}