C++Windowsh写一个图形页面并插入一张图片

#include #include <Windows.h> #include <wingdi.h>

LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { const char* className = "MyWindowClass";

// Register window class
WNDCLASSEX wc;
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = 0;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
wc.lpszMenuName = NULL;
wc.lpszClassName = className;
wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

if (!RegisterClassEx(&wc)) {
    MessageBox(NULL, "Window Registration Failed!", "Error!", MB_ICONEXCLAMATION | MB_OK);
    return 0;
}

// Create window
HWND hwnd = CreateWindowEx(
    WS_EX_CLIENTEDGE,
    className,
    "My Window",
    WS_OVERLAPPEDWINDOW,
    CW_USEDEFAULT, CW_USEDEFAULT, 480, 320,
    NULL, NULL, hInstance, NULL);

if (hwnd == NULL) {
    MessageBox(NULL, "Window Creation Failed!", "Error!", MB_ICONEXCLAMATION | MB_OK);
    return 0;
}

// Show window
ShowWindow(hwnd, nCmdShow);
UpdateWindow(hwnd);

// Message loop
MSG msg;
while (GetMessage(&msg, NULL, 0, 0) > 0) {
    TranslateMessage(&msg);
    DispatchMessage(&msg);
}

return msg.wParam;

}

LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) { switch (msg) { case WM_PAINT: { PAINTSTRUCT ps; HDC hdc = BeginPaint(hwnd, &ps);

    // Load and draw image
    HBITMAP hBitmap = (HBITMAP)LoadImage(NULL, "image.bmp", IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
    HDC hdcBitmap = CreateCompatibleDC(hdc);
    SelectObject(hdcBitmap, hBitmap);
    BITMAP bitmap;
    GetObject(hBitmap, sizeof(bitmap), &bitmap);
    StretchBlt(hdc, 0, 0, 480, 320, hdcBitmap, 0, 0, bitmap.bmWidth, bitmap.bmHeight, SRCCOPY);
    DeleteDC(hdcBitmap);
    DeleteObject(hBitmap);

    EndPaint(hwnd, &ps);
    break;
}
case WM_DESTROY:
    PostQuitMessage(0);
    break;
default:
    return DefWindowProc(hwnd, msg, wParam, lParam);
}

return 0;