Drawing on a Static control [modified]

[koumodaki]

I am working on a Win32 based GUI, which has a menu with a static area defined as CONTROL "",IDC_GRAPH,"Static",SS_GRAYFRAME,17,119,264,54 in the rc file. In my OnPaint(), the following code gets executed HWND hStatic = GetDlgItem(m_hWnd,IDC_GRAPH); //m_hWnd is CWnd handle RECT pRect; HDC hStaticDC= GetDC(hStatic ); GetClientRect(hStatic,&pRect); iCX = (pRect->right - pRect->left)/2; iCY = (pRect->bottom - pRect->top)/2; COLORREF bkColor = GetBkColor(hStaticDC); HPEN pen = CreatePen(PS_SOLID,8,bkColor); MoveToEx(hStaticDC,iCX+4,iCY,NULL); LineTo(hStaticDC,iCX1+4,iCY); The code compiles correctly. But the bkColor gets CLR_INVALID and MoveToEx and LineTo returns a zero value. Where have I gone wrong?

modified on Thursday, December 11, 2008 4:20 AM

[Code o mat]

Are you using the static as a placeholder on your dialog where your drawing is suposed to go? If so, why don't you simply acquire its position and then draw into the dialog's DC? And make your static non-visible? I think it's a simpler method than trying to draw onto a static from another windows OnPaint... anyhows, are you sure you get a correct DC for that static? And why do you MoveToEx and LineTo the same coord? (*iCX+4,iCY), if you want to make a point use SetPixel or SetPixelV instead. Am not sure if 0 length lines are drawn as a point by GDI or not though.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <