关于WPARAM wParam, LPARAM lParam 参数传递

[dulvtianya]

void CGfxOutBarCtrl::OnLButtonDblClk(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
//建立连接放到CTalkDlg中完成
//return 1;
PostMessage(WM_MYDBCLICK,(WPARAM)nFlags,(LPARAM)&point);//这里吧CPoint的地址传给lParam
}

int CGfxOutBarCtrl::OnMyDBClick(WPARAM wParam, LPARAM lParam)
{

/////////////////////////////////////////////////////////
CPoint * ppoint=(CPoint*)lParam;
CPoint point=*ppoint;
//CPoint point=*(CPoint*)lParam;
///我该如何重新获得一个CPoint类型的对象呢，并且保存了point传过来的值
CString stt;
stt.Format("%d,%d",point.x,point.y);
MessageBox(stt);

[wtfelse]

CPoint * ppoint=(CPoint*)lParam;
CString stt;
stt.Format("%d,%d",ppoint->x,ppoint->y);

[ok1234567]

CPoint point
作为局部变量，用PostMessage传送是有风险的
逻辑上应该改用SendMessage

[oyljerry]

为了防止CPoint point的变量作用域失去
你最好在OnLButtonDblClk 就取出对应的x，y等值，然后再消息传递过去...

[biweilun]

CPoint * ppoint=(CPoint*)lParam; 
CString  stt; 
stt.Format("%d,%d",ppoint->x,ppoint->y); 

这样就好了。不过直接传指针恐怕有时会出问题