VC++MFC编程(2)文本显示鼠标编程nFlags参数中包含了鼠标按钮和键盘组合使用标志，用来描述鼠标按钮和键盘上的Shift键和Ctrl键的组合状态。nFlag参数取值范围：MK_LBUTTON：鼠标左键被按下；MK_RBUTTON：鼠标右键被按下；MK_MBUTTON：鼠标中键被按下；MK_SHIFT：键盘上的Shift键被按下；MK_CONTROL：键盘上的Ctrl键被按下；如果想知道某个键是否被按下，可用对应的位屏蔽值与nFlags参数作按位逻辑“与”运算，所的结果若为非零值，则表示该按钮被按下，例如：if(nFlags&LBUTTON)AfxMessageBox(“LButtonispresseddown!”)ElseAfxMessageBox(“LButtonispressedUp!”);如何区分两次单击和一次双击，这取决于两次按下按钮之间的时间间隔，只有当时间间隔小于一定值时才被认为是一次双击。Windows默认的时间为500ms。可以用SetDoubleClickTime()函数来重新设置时间间隔值。捕捉鼠标鼠标编程综合示例voidCMouseView::OnLButtonUp(UINTnFlags,CPointpoint){//TODO:Addyourmessagehandlercodehereand/orcalldefaultCDC*pDC=GetDC();pDC->TextOut(20,40,"LButtonUP!");CView::OnLButtonUp(nFlags,point);}voidCMouseView::OnRButtonDown(UINTnFlags,CPointpoint){//TODO:Addyourmessagehandlercodehereand/orcalldefaultCDC*pDC=GetDC();pDC->TextOut(20,60,"RButtonDown!");CView::OnRButtonDown(nFlags,point);}voidCMouseView::OnRButtonUp(UINTnFlags,CPointpoint){//TODO:Addyourmessagehandlercodehereand/orcalldefaultCDC*pDC=GetDC();pDC->TextOut(20,40,"RButtonUP!");CView::OnRButtonUp(nFlags,point);}voidCMouseView::OnMouseMove(UINTnFlags,CPointpoint){//TODO:Addyourmessagehandlercodehereand/orcalldefaultCDC*pDC=GetDC();chartbuf[80];sprintf(tbuf,"Position:(%3d,%3d)",point.x,point.y);//输出鼠标当前位置pDC->TextOut(20,20,tbuf);CView::OnMouseMove(nFlags,point);}voidCMouseView::OnLButtonDblClk(UINTnFlags,CPointpoint){//TODO:Addyourmessagehandlercodehereand/orcalldefaultCDC*pDC=GetDC();pDC->TextOut(20,80,"LButtonisdoubleclicked!");CView::OnLButtonDblClk(nFlags,point);}voidCMouseView::OnRButtonDblClk(UINTnFlags,CPointpoint){//TODO:Addyourmessagehandlercodehereand/orcalldefaultCDC*pDC=GetDC();pDC->TextOut(20,80,"RButtonisdoubleclicked!");CView::OnRButtonDblClk(nFlags,point);}第五步：编译程序，并验证执行结果。