简单的窗口内容自动填充

/****************************************************************************
设置剪贴板文本
****************************************************************************/
bool SetClipBoardText(const TCHAR* text, HWND hWnd)
{
    assert(hWnd);
    //打开剪贴板
    if (!::OpenClipboard(hWnd))
        return false;
    //empties the clipboard and frees handles to data in the clipboard
    if (!EmptyClipboard())
    {
        CloseClipboard();
        return false;
    }
    //get text length
    int len = _tcslen(text);
    //After SetClipboardData is called, the system owns the object identified by the hMem parameter. 
    //The application can read the data, but must not free the handle or leave it locked. If the 
    //hMem parameter identifies a memory object, the object must have been allocated using the 
    //GlobalAlloc function with the GMEM_MOVEABLE and GMEM_DDESHARE flags. 
    HANDLE hClip = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE, (len + 1)*sizeof(TCHAR));
    if (hClip == NULL)
    {
        CloseClipboard();
        return false;
    }
    //locks a global memory object and returns a pointer to the first byte of the object's memory block
    TCHAR* pBuf = (TCHAR*)GlobalLock(hClip);
    if (pBuf == NULL)
    {
        GlobalFree(hClip);
        CloseClipboard();
        return false;
    }

    memcpy(pBuf, text, len*sizeof(TCHAR));
    pBuf[len] = NULL;

    GlobalUnlock(hClip);
    if (NULL == SetClipboardData(CF_TEXT, hClip))
    {
        GlobalFree(hClip);
        CloseClipboard();
        return false;
    }

    CloseClipboard();
    return true;
}



int _tmain(int argc, _TCHAR* argv[])
{
    //设置类名和窗口名
    HWND hWnd = ::FindWindow(L"ClassName",L"WindowName");

    if (NULL != hWnd)
    {
        ::SetForegroundWindow(hWnd);
        //RECT rc;
        //::GetWindowRect(hWnd, &rc);
        //::SetCursorPos(rc.left + 257, rc.top + 281);
        //257 + (281<<16)效果同上面三句，设置坐标，坐标可以由spy++获得
        ::SendMessage(hWnd, WM_LBUTTONDOWN,0, 257 + (281<<16));
        SetClipBoardText(_T("2433453"),hWnd);
        ::SendMessage(hWnd, WM_PASTE, 0, 0);
    }
    system("pause");
    return 0;
}