Mouse buttons choosing color

[darrellm58]

THis code is straight out of a text book but the color is always black. It is suppossed to draw black with one mouse button and red with the other. Can anyone spot a problem? Thanks.
************
void CMouseDlg::OnMo useMove(UINT nFlags, CPoint point)
{

if (((nFlags & MK_LBUTTON) == MK_LBUTTON) ||
((nFlags & MK_RBUTTON) == MK_RBUTTON))
{

CPen lpen;
CClientDC dc(this);
CPen* pPrevPen = NULL;



if ((nFlags & MK_LBUTTON) == MK_LBUTTON)
CPen lpen(PS_SOLID, 16, RGB(255,0,0));

if ((nFlags & MK_RBUTTON) == MK_RBUTTON)
CPen lpen(PS_SOLID, 16, RGB(255,0,0));

pPrevPen = dc.SelectObject (&lpen);
dc.MoveTo(m_iPr evx, m_iPrevy);
dc.LineTo(point .x, point.y);
m_iPrevx = point.x;
m_iPrevy = point.y;
dc.SelectObject (pPrevPen);
}
CDialog::OnMous eMove(nFlags, point);
}




void CMouseDlg::OnLB uttonDown(UINT nFlags, CPoint point)
{
m_iPrevx = point.x;
m_iPrevy = point.y;
CDialog::OnLBut tonDown(nFlags, point);
}

void CMouseDlg::OnRB uttonDown(UINT nFlags, CPoint point)
{
m_iPrevx = point.x;
m_iPrevy = point.y;
CDialog::OnRBut tonDown(nFlags, point);
}
*************** ****

[Abhinaba Basu]

Re: Mouse buttons choosing color

try the following code MouseMove
=============== =============== =============== ========
CPen lpen;
CClientDC dc(this);
CPen* pPrevPen = NULL;


if ((nFlags & MK_LBUTTON) == MK_LBUTTON)
lpen.CreatePen( PS_SOLID, 16, RGB(255,0,0));

if ((nFlags & MK_RBUTTON) == MK_RBUTTON)
lpen.CreatePen( PS_SOLID, 16, RGB(255,0,0));

pPrevPen = dc.SelectObject (&lpen);
dc.MoveTo(m_iPr evx, m_iPrevy);
dc.LineTo(point .x, point.y);
m_iPrevx = point.x;
m_iPrevy = point.y;
dc.SelectObject (pPrevPen);
=============== =============== =============== ========

Notice that I have changed the CPen lpen(....) to lpen.CreatePen

I think this will work for you.

"darrellm58 " <darrellm58@dis cussions.micros oft.com> wrote in message
news:ED954013-2B3C-47F9-BE46-0B739856F499@mi crosoft.com...[color=blue]
> THis code is straight out of a text book but the color is always black. It[/color]
is suppossed to draw black with one mouse button and red with the other. Can
anyone spot a problem? Thanks.[color=blue]
> ************
> void CMouseDlg::OnMo useMove(UINT nFlags, CPoint point)
> {
>
> if (((nFlags & MK_LBUTTON) == MK_LBUTTON) ||
> ((nFlags & MK_RBUTTON) == MK_RBUTTON))
> {
>
> CPen lpen;
> CClientDC dc(this);
> CPen* pPrevPen = NULL;
>
>
>
> if ((nFlags & MK_LBUTTON) == MK_LBUTTON)
> CPen lpen(PS_SOLID, 16, RGB(255,0,0));
>
> if ((nFlags & MK_RBUTTON) == MK_RBUTTON)
> CPen lpen(PS_SOLID, 16, RGB(255,0,0));
>
> pPrevPen = dc.SelectObject (&lpen);
> dc.MoveTo(m_iPr evx, m_iPrevy);
> dc.LineTo(point .x, point.y);
> m_iPrevx = point.x;
> m_iPrevy = point.y;
> dc.SelectObject (pPrevPen);
> }
> CDialog::OnMous eMove(nFlags, point);
> }
>
>
>
>
> void CMouseDlg::OnLB uttonDown(UINT nFlags, CPoint point)
> {
> m_iPrevx = point.x;
> m_iPrevy = point.y;
> CDialog::OnLBut tonDown(nFlags, point);
> }
>
> void CMouseDlg::OnRB uttonDown(UINT nFlags, CPoint point)
> {
> m_iPrevx = point.x;
> m_iPrevy = point.y;
> CDialog::OnRBut tonDown(nFlags, point);
> }
> *************** ****
>
>[/color]