MFC c++,下边这个是鼠标经过事件,想改成鼠标经过"且"同时按鼠标左键代码才生效怎么改?谢谢

BOOL CDicomView3DDlg::PreTranslateMessage(MSG* pMsg)
{

// TODO: 在此添加专用代码和/或调用基类
if (pMsg->hwnd == m_pic1.m_hWnd && pMsg->message == WM_MOUSEMOVE)//自定义控件上的消息
{
BYTE *frameBuf ;
BYTE a[256][4];
BYTE *Buf;
HBITMAP hbmp;
...

在你的if里添加 ：

UINT nFlags=pMsg->wParam;

if ( nFlags & MK_LBUTTON )
{

}

#ifndef _mousepro_h_ #define _mousepro_h_ class cmyapp : public cwinapp { public: virtual bool initinstance(); }; class cmainwindow : public cframewnd { public: cmainwindow(); protected: bool m_bup; cstring buffer; afx_msg void onpaint(); afx_msg void onlbuttondown(); afx_msg void onlbuttonup(); declare_message_map() }; #endif // _mousepro_h_ ========================================= #include <afxwin.h> #include "mousepro.h" cmyapp myapp; bool cmyapp::initinstance() { m_pmainwnd = new cmainwindow; m_pmainwnd->showwindow(m_ncmdshow); m_pmainwnd->updatewindow(); return true; } // initinstance // begin_message_map(cmainwindow, cframewnd) on_wm_paint() on_wm_lbuttondown() on_wm_lbuttonup() end_message_map() cmainwindow::cmainwindow() { create(null, "mouse pro"); m_bup = false; } // default constructor void cmainwindow::onpaint() { cpaintdc dc(this); crect rect; getclientrect(&rect); int imousebuttons; cstring string; imousebuttons = ::getsystemmetrics(sm_cmousebuttons); string.format("mouse has %d button(s)!", imousebuttons); dc.textout(10, 0, string); if (m_bup) { dc.textout(10, 60, buffer); } else { // do not recieve onlbuttonup message // but left button is up if (::getkeystate(vk_lbutton) < 0) { buffer.format("left mouse pressed!"); } dc.textout(10, 50, buffer); } } // onpaint void cmainwindow::onlbuttondown() { m_bup = false; buffer.format("left button down!"); setcapture(); invalidate(); } // onlbuttondown void cmainwindow::onlbuttonup() { m_bup = true; if (getcapture() == this) { ::releasecapture(); buffer.format("no matter your mouse is in or out client area! i can capture you! :) "); } invalidate(); } // onlbuttonup ============================================= 加入鼠标处理函数就可以了。

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