geomvigla
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Dialog boxes-change the background an edit box
Hi,I create a dialog based project and I want to change the background of an edit box when it takes a value.please, can you tell me how can I do it?If you can, send me the code of doing this.THANK you
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Under the Message Maps tab, Select the main dialog class object
In Messages, select WM_CTLCOLOR.
Click [Add Function]
Click [Edit Code]
Make it so:
HBRUSH CD31Dlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
if ( pWnd->m_hWnd == GetDlgItem( IDC_EDIT1 )->m_hWnd ) {
if ( m_fEditIsRed ) {
pDC->SetTextColor( RGB(255,255,255) ); // white
pDC->SetBkColor( RGB(255,0,0) ); // red
return( m_hbrEditBkgd );
)
}
return hbr;
}
Back in the ClassWizard (Ctrl+W)
Under the Message Maps tab... Select the main dialog class object
In the Object IDs, select IDC_EDIT1 (or whatever is the ID of the edit box)
In Messages, select EN_CHANGE
Click [Add Function]
Click [Edit Code]
Make it so:
void CD31Dlg::OnChangeEdit1()
{
m_fEditIsRed= TRUE;
::DeleteObject(m_hbrEditBk
m_hbrEditBkgd= ::CreateSolidBrush( RGB(255,0,0) ); // Red (changed)
GetDlgItem( IDC_EDIT1 )->Invalidate();
}
Scroll up to the OnInitDialogBox fn in theis main dlg cpp file. Add these lines:
m_hbrEditBkgd= ::CreateSolidBrush( RGB(255,255,255) ); // white (unchanged)
h_fEditIsRed= FALSE;
Open the .H file for the main dialog. Add this into the class def:
HBRUSH m_hbrEditBkgd;
BOOL m_fEditIsRed;
=-=-=-=-=-=-=-=-=-=-=-=-=-
Now, as soon as the user begins typing, the background of that edit control will change to RED.
If you want to wait until the user finishes typing, comment out the stuff in OnChangeEdit1 and use the ClassWizard to create a handler for EN_KILLFOCUS for IDC_EDIT1. Make the code of you OnKillFocusEdit1() fn do the same as described above for OnCHangeEdit1.
-- Dan