1. Overload onctlcolor (CDC * PDC, cwnd * pwnd, uint nctlcolor), that is, wm_ctlcolor message.
---- ① Add a member variable of cbrush to the header file of cexampledlgdlg:
Class cexampledlgdlg: Public cdialog
{...
Protected:
Cbrush m_brush;
...
};
---- ② Add the following to the oninitdialog () function: Code :
Bool cexampledlgdlg: oninitdialog ()
{
...
// Todo: add extra initialization here
M_brush.createsolidbrush (RGB (0,255, 0); // generate a green brush
...
}
---- ③ Use classwizard to overload onctlcolor (...), That is, wm_ctlcolor message:
Hbrush cexampledlgdlg: onctlcolor
(CDC * PDC, cwnd * pwnd, uint nctlcolor)
{
/*
** No code is required here!
** The downstream code should be commented out.
** Hbrush HBr = cdialog: onctlcolor (PDC, pwnd, nctlcolor );
*/
Return m_brush; // Add a green brush
} 2. Modify onpaint in the dialog box and add the following code to else:
Cpaintdc DC (this );
Crect rect;
Getclientrect (rect );
DC. fillsolidrect (rect, RGB (0, 0 ));
Cdialog: onpaint (); 3. Add the code to the initinstance () of. cpp of the application class (APP) in the dialog box:
// Add int nresponse = DLG. domodal ();
Set the background color for the previous RGB image and the font color for the second image.
Setdialogbkcolor (RGB (255, 0,255), RGB (, 0 )); 4. 1. Add member variables in the dialog box class:
Public:
Cbrush m_brushblue;
2. Add the code in oninitdialog () of the dialog box class:
M_brushblue.createsolidbrush (RGB (0, 0, 255 ));
3. Use classwizard to add the onctlcollor () member function to the dialog box class and add the code in it:
If (nctlcolor = ctlcolor_dlg)
Return m_brushblue; |
