gcc（Mingw-W64）编译windows程序，提示undefined reference to `__imp_GetStockObject' 的解决方法：加上-mwindows，问题解决。

#include <windows.h>

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int iCmdShow)
{
    WNDCLASSEX wndclass;
    static LPCTSTR szAppName = TEXT("HelloWin");
    HWND   hWnd;
    MSG    msg;

    wndclass.cbSize = sizeof(WNDCLASSEX);
    wndclass.style = CS_HREDRAW | CS_VREDRAW;

    wndclass.lpfnWndProc = WndProc;

    wndclass.cbClsExtra = 0;
    wndclass.cbWndExtra = 0;

    wndclass.hInstance = hInstance;

    wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);

    wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);

    wndclass.lpszMenuName = NULL;
    wndclass.lpszClassName = szAppName;
    wndclass.hIconSm = NULL;

    RegisterClassEx(&wndclass);


    hWnd = CreateWindow(szAppName,  // window class name
        TEXT("Windows Demo"),   // window title
        WS_OVERLAPPEDWINDOW,        // window style
        CW_USEDEFAULT,              // initial x position
        CW_USEDEFAULT,              // initial y position
        CW_USEDEFAULT,              // initial x size
        CW_USEDEFAULT,              // initial y size
        NULL,                    // parent window handle
        NULL,                    // window menu handle
        hInstance,                  // program instance handle
        NULL);                   // creation parameters

    ShowWindow(hWnd, iCmdShow);     // display the window
    UpdateWindow(hWnd);             // redraw window client area

    while (GetMessage(&msg, NULL, 0, 0) == TRUE)
    {
        TranslateMessage(&msg);     // translate the message
        DispatchMessage(&msg);      // dispatch the message
    }

    return msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    HDC             hdc;
    PAINTSTRUCT     ps;
    RECT            rect;

    switch (message)
    {
    case WM_PAINT:
        hdc = BeginPaint(hwnd, &ps);
        GetClientRect(hwnd, &rect);
        SetBkMode(hdc, TRANSPARENT);

        DrawText(hdc, TEXT("Hello, Win32!"), -1, &rect, DT_SINGLELINE | DT_CENTER | DT_VCENTER);

        EndPaint(hwnd, &ps);
        return 0;

    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    }
    return DefWindowProc(hwnd, message, wParam, lParam);
}