CDialog

Viorel

I think the appropriate place to change the background colour of your dialog box is the handler for WM_ERASEBKGND notification. You can put here just two lines:

BOOL CMyDlg::OnEraseBkgnd(CDC* pDC)
{
	pDC->FillRect(CRect(0,0,32000,32000), &CBrush(RGB(0,0,255))); // blue
	return TRUE;
}

If you need to vary the colour (or just to optimize the solution), make a CBrush member variable and use CreateSolidBrush to set the colour. You can use CreatePatternBrush or CreateHatchBrush to have another kind of background. -- modified at 3:13 Friday 16th June, 2006

Naveen

one way HBRUSH MYDialog::OnCtlColor( CDC* pDC_i, CWnd* pWnd_i, UINT uCtlColor_i ) { HBRUSH hDefaultBrush = CDialog::OnCtlColor( pDC_i, pWnd_i, uCtlColor_i ); if( CTLCOLOR_DLG == uCtlColor_i ) { // Return a black brush so that the background become balck return reinterpret_cast(GetStockObject( BLACK_BRUSH )); } return hDefaultBrush; } Another way from the InitInstance of the App class u may call SetDialogBkColor( RGB(255,0,0) ) nave

User 3037427

But the background color is not changing. Here is my code: OnPaint() { ............. CSliderApp* app=(CSliderApp*)AfxGetApp(); app->ChangeDialogColor((COLORREF)m_clr.GetPos()); } void CSliderApp::ChangeDialogColor(COLORREF ref) { SetDialogBkColor(ref); } Is there anything wrong:confused:

Hamid Taebi

what error you have previous error can you show your code that how to use to change background color_**

**_

whitesky

Viorel

If you are using VS 2003 or VS 2005, you will found that the definition of SetDialogBkColor function in afxwin2.inl file is:

_AFXWIN_INLINE void CWinApp::SetDialogBkColor(COLORREF /*clrCtlBk*/, COLORREF /*clrCtlText*/)
{
}

Therefore it does nothing. Documentation says that it is obsolete. You should consider other solutions.

Eytukan

Though you could do it by these ways, HandlingWM_ERASEBKGND is the right one for it.

--[:jig:]-- [My Current Status]

Naveen

ok... i Understood instead of calling the ChangeDialogColor from onPaint call this Function as the first line of OnCtlColor funtion nave

Hamid Taebi

but i want to know why he cant show controls its attract for me to find answer for this question (of course i need to see his code that how to use)_**

**_

whitesky

User 3037427

No its not working. Thanks for ur reply.:)

Naveen

ok another way... forgot every thing done before...Now do as below 1. Create a member variable of CBrush say m_BkBrush 2. Write Function like this ChangeColor( COLORREF clr_i ) { if( m_BkBrush.m_hObject ) m_BkBrush.DeleteObject(); m_BkBrush.CreateSolidBrush( clr_i ) Invalidate(); } 3. Call this function in the OnInitDialog and where ever u want to change the color 4. now overide the WM_CTLCOLOR message and inside that write as below HBRUSH MYDialog::OnCtlColor( CDC* pDC_i, CWnd* pWnd_i, UINT uCtlColor_i ) { HBRUSH hDefaultBrush = CDialog::OnCtlColor( pDC_i, pWnd_i, uCtlColor_i ); if( CTLCOLOR_DLG == uCtlColor_i ) { return m_BkBrush; } return hDefaultBrush; } try and tell me the result..;) nave

User 3037427

Sorry, its not working.:(

Naveen

ok yaar..I cannot figure out why its not working.... Well...Where r u working..? I am from India->Kerala.. nave

User 3037427

My code is: BOOL CSliderDlg::OnEraseBkgnd(CDC* pDC) { if(m_clr.GetPos()!=0) { int color=m_clr.GetPos(); COLORREF clr=RGB(color,color,color); CRect rect; GetClientRect(&rect); pDC->FillSolidRect(&rect,clr); } return CDialog::OnEraseBkgnd(pDC); } I am calling this function from WM_HSCROLL handler. m_clr is the slider ctrl. If there is any mistake in my, let me that mistake. Thanx.:)

Hamid Taebi

this code it seems not problem i tested this code and it work fine of course without if(m_clr.GetPos()!=0) like this BOOL CAnswerDlg::OnEraseBkgnd(CDC* pDC) { //int color=m_clr.GetPos(); COLORREF clr=RGB(53,97,200); CRect rect; GetClientRect(&rect); pDC->FillSolidRect(&rect,clr); return TRUE; } and controls are visible you can use WM_CTLCOLOR with a brush and it work and i think it good for you_**

**_

whitesky

User 3037427

I want to change the back ground of dialog when i move the slider ctrl. That's why i used int color=m_clr.GetPos(); Ths background of the dialog was changing but the controls are not visible.