MFC Changes dialog box background color

Original link: http://blog.sina.com.cn/s/blog_59955afc0100spjz.html

method One: Call the member function of the CWinApp class SetDialogBkColor to implement.

----where the first parameter of the function specifies the background color, the second parameter specifies the text color.
The following example is to set the Application dialog box to a blue background and red text, in the following steps:

----① Create a new dialog-based MFC AppWizard application Exampledlg.

----② Add the following code in Cexampledlgapp:: InitInstance ():

BOOL Cexampledlgapp:: InitInstance ()
{
... ..
Cexampledlgdlg dlg;
m_pMainWnd = &dlg;

///Before DoModal (), Set the dialog box to blue background, red text
SetDialogBkColor (RGB (0,0,255), RGB (255,0,0));
int nresponse = dlg. DoModal ();
... ..
}

----compiled and run, the background color and text color of the dialog box have changed. It is worth noting that
Yes: You must call SetDialogBkColor before calling DoModal (), and this method will change
all dialog boxes in the application are colored and cannot be specified for a specific dialog box.
 
method Two: Overload OnPaint (), which is the WM_PAINT message. The code is as follows (the above example works):

void Cexampledlgdlg::onpaint ()
{
if (Isiconic ())
... ..
Else
{
CRect rect;
CPAINTDC DC (this);
GetClientRect (rect);
DC. Fillsolidrect (Rect,rgb (0,255,0)); Set to green background

cdialog::onpaint ();
}


method Three: Overload OnCtlColor (cdc* PDC, cwnd* pWnd, UINT nctlcolor),
that is, the WM_CTLCOLOR message. The specific steps are as follows (the above example works):
----① in Cexampledlgdlg's header file, add a cbrush member variable:

class Cexampledlgdlg:public CDialog
{
...
protected:
CBrush M_brush;
...
};


----② Add the following code in the OnInitDialog () function:
BOOL Cexampledlgdlg::oninitdialog ()
{
...
//Todo:add extra initialization here
M_brush. CreateSolidBrush (RGB (0, 255, 0)); Generate a green brush
...
} 

----③ Use ClassWizard to overload the OnCtlColor (...), which is the WM_CTLCOLOR message:
Hbrush Cexampledlgdlg::onctlcolor
(cdc* PDC, cwnd* pWnd, UINT nCtlColor)
{
/*
* * Don't write any code here!
* * The downlink code is commented out
* * Hbrush HBR = Cdialog::onctlcolor (PDC, PWnd, nCtlColor);
*/

return M_brush;//Add Green Brush
}


method Four: or overload OnCtlColor (cdc* PDC, cwnd* pWnd, UINT nctlcolor),
that is, the WM_CTLCOLOR message. The specific steps are as follows (the above example works):
----Steps ①, ② the steps in the same method three ①, ②.

----Step ③ using ClassWizard overload onctlcolor (...) (That is, wm_ctlcolor messages), there is
Some differences:

Hbrush Cexampledlgdlg::onctlcolor
(cdc* PDC, cwnd* pWnd, UINT nCtlColor)
{
hbrush HBR = Cdialog::onctlcolor (PDC, PWnd, nCtlColor);

//In this add-on is a dialog box is a judgment statement
if (nCtlColor ==ctlcolor_dlg)
return M_brush;//Add Green Brush
return HBR;
}

MFC Changes dialog box background color