求助，请各位大神帮忙解决一下SDK的问题

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    HBITMAP hbmp;
    HDC srchdc;
    int wmId, wmEvent;
    PAINTSTRUCT ps;
    HDC hdc;
    POINT pt;
    STRING szString[100];

    switch (message)
    {
    case WM_COMMAND:
        wmId    = LOWORD(wParam);
        wmEvent = HIWORD(wParam);
        // 分析菜单选择:
        switch (wmId)
        {
        case IDM_ABOUT:
            DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
            break;
        case IDM_EXIT:
            if(IDYES==MessageBox(hWnd,TEXT("真的要退出吗？"),TEXT("注意"),MB_YESNO))
               DestroyWindow(hWnd);
            break;
        default:
            return DefWindowProc(hWnd, message, wParam, lParam);
        }
        break;
    case WM_PAINT:
        hdc = BeginPaint(hWnd, &ps);
        hbmp=LoadBitmap(hInst,(LPCTSTR)IDB_HEAD);
        srchdc=CreateCompatibleDC(hdc);
        SelectObject(srchdc,hbmp);
        BitBlt(hdc,0,0,1024,800,srchdc,0,0,SRCCOPY);
        DeleteObject(hbmp);
        DeleteObject(srchdc);
        RECT rt;
        GetClientRect(hWnd,&rt);
        DrawText(hdc,TEXT("Hello World"),strlen("Hello World"),&rt,DT_BOTTOM|DT_LEFT);

        // TODO: 在此添加任意绘图代码...
        EndPaint(hWnd, &ps);
        break;
    case WM_MOUSEMOVE:
        pt.x=LOWORD(lParam);
        pt.y=HIWORD(lParam);
        //sprintf(szString,"[  %d, %d]",pt.x,pt.y);
        hdc=GetDC(hWnd);
        TextOut(hdc,300,200,TEXT(szString),200);
        ReleaseDC(hWnd,hdc);
        //......
        break;

红色部分的哪里错了，为什么编译的时候会出现这样的情况，我用的版本是visual studio 2008的。各位大神帮帮忙！3Q