ChildView.cpp; (class CChildView : public CWnd， OnPaint() is here)
MainFrm.cpp; (class CMainFrame : public CFrameWnd)
ImagePro.cpp;(class CImageProApp : public CWinApp)
I also create CModalLessDlg using the dialog template, which is defined in ModalLessDlg.cpp and ModalLessDlg.h
In the ModalLessDlg.cpp, I want to press the "Begin" button to send a text to the "view"
you can realize it like this:
1. in MainFrm.h, there is one protected variable:
protected: CChildView m_wndView;
change it as public variable:
public: CChildView m_wndView;
2. in ModalLessDlg.cpp:
#define WM_MY_DOSOME (WM_USER+1)
3. in ModalLessDlg.cpp:
void CModalLessDlg::OnBegin() //
{
// TODO: start
CMainFrame *pFrame=(CMainFrame*)(AfxGetApp()->m_pMainWnd);
char buf[]="I LOVE YOU";
(pFrame->m_wndView).SendMessage(WM_MY_DOSOME,(WPARAM)buf,0);
}
4. In ChildView.h, add the following:
afx_msg LRESULT OnMyMessage(WPARAM wParam, LPARAM lParam);//before DECLARE_MESSAGE_MAP()
5. in ChildView.cpp, add the following:
BEGIN_MESSAGE_MAP(CChildView, CWnd) // ... ON_MESSAGE(WM_MY_DOSOME,OnMyMessage) //only need to add this line //... END_MESSAGE_MAP()//then realize the response function:
LRESULT CChildView::OnMyMessage(WPARAM iParam1,LPARAM iParam2)
{
char *buf=(char *)iParam1;
CString str;
str.Format("%s",buf);
MessageBox(str);
return 0L;
}
the function is only a test to see whether you can receive the text or not, you can also show it in the client area of the view through Invalidate() again in this OnMyMessage function.
