Writing text to an LCD screen / WinCE6.0+VS2005

Question

Anyone have any idea why won't this code won't work for WinCE6.0/PlatformBuilder/VS2005+MFC for an LCD on a smart device ARM development kit?  It works in the OnPaint() function only, but nowhere else in the code like from a button control handler:

CPaintDC dc2 (this);

dc2.SetTextColor (RGB (0,0,255));

dc2.SetBkColor(RGB(255,0,0)); 

int num2 = 123;

WCHAR string2[11];

size_t strlen2 = 11;           //max string length of integer

LPCTSTR format2 = L"%s %d";

WCHAR* insert2 = L"screen";

StringCchPrintfW(string2,strlen2,format2,insert2,num2);  //convert int to LPCTSTR `

 ExtTextOut(dc2,50,50,0,NULL,string2,strlen2,NULL);      //wcslen for wide characters

(Tried using a Rectangle, but that made no difference.)

Thanks for your help.  CM007

Answer 1

Hello,

If your codes in MFC project, I suggest you to use  CClientDC to drawtext.

And call this function  CClientDC.ExtTextOut()
http://msdn.microsoft.com/zh-cn/library/e28c8dxx.aspx

The ExtTextOut function need HDC
http://msdn.microsoft.com/en-us/library/dd162713(v=vs.85).aspx
You need to use
hdc=::GetDC(m_hWnd); to get the hdc.

Best regards,
Jesse

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Jesse Jiang [MSFT]
MSDN Community Support | Feedback to us

Answer 2

Hi Jesse,

I think you replied to one of my earlier posts.  Don't know who you are, but you are excellent!  What you suggested worked.  Now I have the writing capaility that I need as well as the location of the rest of the MFC member functions that I'll need going forward.  Thank you for being such a valuable resource, and for taking the time to help the rest of us.

CM007