#include <windows.h>

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
DWORD WINAPI MyThread(LPVOID lpParameter);

int APIENTRY WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nCmdShow)
{
    WNDCLASSEX wndclass;
    static char szAppName[] = "Hello Everyone";
    wndclass.cbSize = sizeof(wndclass);
    wndclass.style = CS_HREDRAW|CS_VREDRAW;
    wndclass.lpfnWndProc = WndProc;
    wndclass.cbClsExtra = 0;
    wndclass.cbWndExtra = 0;
    wndclass.hInstance = hInstance;
    wndclass.hIcon = LoadIcon(hInstance,IDI_APPLICATION);
    wndclass.hCursor = LoadCursor(NULL,IDC_ARROW);
    wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
    wndclass.lpszMenuName = NULL;
    wndclass.hIconSm = LoadIcon(NULL,IDI_APPLICATION);
    RegisterClassEx(&wndclass);

    DWORD dw;
    HANDLE handle;
    handle = CreateThread(NULL,0,MyThread,(LPVOID)&wndclass,0,&dw);

    CloseHandle(handle);
    ::MyThread(&wndclass);

    return 0;

}

DWORD WINAPI MyThread(LPVOID lpParameter)
{
    HWND hWnd;
    MSG msg;
    WNDCLASSEX * pw = (WNDCLASSEX *) lpParameter;

    hWnd = CreateWindow(pw->lpszClassName,"My Hello Program",WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,NULL,NULL,pw->hInstance,NULL);
    ShowWindow(hWnd,SW_SHOWNORMAL);

    while(GetMessage(&msg,NULL,0,0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd,UINT iMessage,WPARAM wParam,LPARAM lParam)
{
    HDC dc;
    PAINTSTRUCT ps;
    RECT rect;

    switch(iMessage)
    {
    case WM_PAINT:
        dc = BeginPaint(hWnd,&ps);
        GetClientRect(hWnd,&rect);
        DrawText(dc,"Hello,Everyone",-1,&rect,DT_SINGLELINE|DT_CENTER|DT_VCENTER);
        EndPaint(hWnd,&ps);
        return 0;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hWnd,iMessage,wParam,lParam);
    }

    return (0);
}









求指点。

窗口没名字 加上

wndclass.lpszClassName = szAppName;