Mood:
cheekyTopic: VC++
Windows provides us a way to override the look and feel of a component at runtime throught this method.
For more information take a look at the MSDN documenation on
OnCtlColor().
The nCtlColor parameter contains the category of the control being painted, for eg:
CTLCOLOR_BTN -- Button control
CTLCOLOR_DLG -- Dialog box
CTLCOLOR_EDIT -- Edit control
CTLCOLOR_LISTBOX -- List-box control
CTLCOLOR_MSGBOX -- Message box
CTLCOLOR_SCROLLBAR -- Scroll-bar control
CTLCOLOR_STATIC -- Static control
Well if you want to check for the painting of a particular control then use
pWnd->GetDlgCtrlID(), which returns the id of the control being painted.
The device of the context of the control being painted is in the pointer pDC.
This is how we go about it:
HBRUSH CTestDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
//call base class implementation first otherwise it may undo what we have done.
HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
//Get the ctrl id and check whether we are painting the edit control or not.
if (pWnd->GetDlgCtrlID() == IDC_OF_EDITBOX)
{
// Set the text color to red.
pDC->SetTextColor(RGB(255, 0, 0));
//set to trasparent mode
pDC->SetBkMode(TRANSPARENT);
//unless we do this there won't be any effect.
hbr = m_brush;
}
return hbr;
}
Posted by Nibu babu thomas
at 11:05 AM
Updated: Thursday, 10 November 2005 4:47 PM
