在非主线程中创建窗口的方法

   HINSTANCE hPrevInstance,
                    LPTSTR    lpCmdLine,
                    int       nCmdShow)
{
     // TODO: Place code here.
    
    g_hInst = hInstance;

    CreateWnd();

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

    return 0;
}
    如果我们创建一个线程,然后在这个线程中创建窗口,看看带给我们的是什么:
 
#include \"windows.h\"

HWND g_hWnd = NULL;
HINSTANCE g_hInst;

LRESULT WndProc(HWND hWnd,UINT wMsg,WPARAM wParam,LPARAM lParam)
{
    return DefWindowProc(hWnd,wMsg,wParam,lParam);
}

void CreateWnd(void)
{    

    WNDCLASS wc = {0};
    wc.style         = 0;
    wc.lpfnWndProc   = WndProc;
    wc.cbClsExtra    = 0;
    wc.cbWndExtra    = 0;
    wc.hInstance     = g_hInst;
    wc.hIcon         = NULL; 
    wc.hCursor       = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH)GetSysColorBrush(COLOR_WINDOW);
    wc.lpszMenuName  = NULL;
    wc.lpszClassName = TEXT(\"SimpleWindow\");

    RegisterClass(&wc);

    g_hWnd = CreateWindowEx(0, [Page]
                TEXT(\"SimpleWindow\"),
                TEXT(\"SimpleWindow\"),
                WS_VISIBLE,
                0,
                0,
                200,
                200,
                NULL, 
                NULL,