简单的MFC小程序在xp上可以, 在win7上不行,请教各位高手
TicTac.h:
程序代码：
class CMyApp : public CWinApp
{
public:
virtual BOOL InitInstance ();
};
class CMainWindow : public CWnd
{
public:
CMainWindow ();
protected:
afx_msg void OnLButtonDown (UINT nFlags, CPoint point);
DECLARE_MESSAGE_MAP ()
};
TicTac.cpp:
程序代码：
#include <afxwin.h>
#include "TicTac.h"
CMyApp myApp;
/////////////////////////////////////////////////////////////////////////
// CMyApp member functions
BOOL CMyApp::InitInstance ()
{
m_pMainWnd = new CMainWindow;
m_pMainWnd->ShowWindow (m_nCmdShow);
m_pMainWnd->UpdateWindow ();
return TRUE;
}
/////////////////////////////////////////////////////////////////////////
// CMainWindow message map and member functions
BEGIN_MESSAGE_MAP (CMainWindow, CWnd)
ON_WM_LBUTTONDOWN ()
END_MESSAGE_MAP ()
CMainWindow::CMainWindow ()
{
//
// Register a WNDCLASS.
//
CString strWndClass = AfxRegisterWndClass (
CS_DBLCLKS, // Class style
AfxGetApp ()->LoadStandardCursor (IDC_ARROW), // Class cursor
(HBRUSH) (COLOR_3DFACE + 1), // Background brush
AfxGetApp ()->LoadStandardIcon (IDI_WINLOGO) // Class icon
);
//
// Create a window.
//
CreateEx (0, strWndClass, _T ("Tic-Tac-Toe"),
WS_OVERLAPPED | WS_SYSMENU | WS_CAPTION | WS_MINIMIZEBOX,
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL);
}
void CMainWindow::OnLButtonDown (UINT nFlags, CPoint point)
{
CClientDC dc (this);
dc.MoveTo(0, 0);
dc.LineTo(100, 100);
}
目的就是点击鼠标左键,画一条线. 在xp上点击后,画的线立马显示, 在win7上点击后,画的线不出现,除非我将鼠标移到其它窗口上点击一下,再回来才显示,到底怎么回事呢?
