运用c语言创建窗口

在C语言中，创建窗口可以使用外部库或API。以下是使用Windows API创建窗口的示例代码：

#include <windows.h>

LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
    // Register the window class
    const char CLASS_NAME[]  = "Sample Window Class";
    
    WNDCLASS wc = {0};

    wc.lpfnWndProc   = WindowProc;
    wc.hInstance     = hInstance;
    wc.lpszClassName = CLASS_NAME;

    RegisterClass(&wc);

    // Create the window
    HWND hwnd = CreateWindowEx(
        0,                              // Optional window styles
        CLASS_NAME,                     // Window class
        "Learn to Program Windows",     // Window text
        WS_OVERLAPPEDWINDOW,            // Window style

        // Size and position
        CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,

        NULL,       // Parent window    
        NULL,       // Menu
        hInstance,  // Instance handle
        NULL        // Additional application data
        );

    if (hwnd == NULL)
    {
        return 0;
    }

    // Display the window
    ShowWindow(hwnd, nCmdShow);

    // Run the message loop
    MSG msg = {0};
    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return 0;
}

LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch (uMsg)
    {
        case WM_DESTROY:
            PostQuitMessage(0);
            return 0;

        case WM_PAINT:
            {
                PAINTSTRUCT ps;
                HDC hdc = BeginPaint(hwnd, &ps);

                FillRect(hdc, &ps.rcPaint, (HBRUSH) (COLOR_WINDOW+1));

                EndPaint(hwnd, &ps);
            }
            return 0;

    }

    return DefWindowProc(hwnd, uMsg, wParam, lParam);
}

此代码将创建一个基本的窗口，它将显示一个标题为“Learn to Program Windows”的窗口。如果没有任何错误，此代码将返回零。如果有任何错误，则将返回一个非零值。