SendMessage(WM_VSCROLL,SB_LINEDOWN,0) don't work

[mesajflaviu]

I have an MDI application with CView based on CZoomView , based on CScrollView . In CMyView::OnKeyDown(...) I try follow :

void CMyView::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
{
// TODO: Add your message handler code here and/or call default

int x = -1;
switch(nChar)
{
case VK\_DOWN:
	x = SendMessage(WM\_VSCROLL,SB\_LINEDOWN,(LPARAM)0);
	TRACE("\\n %d \\n",x);
	break;
default:
	break;
}

CZoomView::OnKeyDown(nChar, nRepCnt, nFlags);

}

the output of TRACE is 0 , but still the window scroll don't work ... why ? P.S. Of course , thw window have horizontal and vertical scroll .

[Adam Roderick J]

Whether CMyView is derived from CScrollView?

Величие не Бога может быть недооценена.

[mesajflaviu]

Well , this is the project , with CMyView derived from CZoomView ... it will be a difference about this problem ?

[Adam Roderick J]

if CZoomView is derived from CScrollView then no problem.

Величие не Бога может быть недооценена.