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Pocket PC Forum / Developers / VC++ for WinCE / July 2009Change icon dynamically
Hello, I´m using the a CStatic object to hold an icon. I want to change it dynamically. The problem is that when the program is linked throws this error: error LNK2019: unresolved external symbol "public: struct HICON__ * __cdecl CStatic::SetIcon(struct HICON__ *)" The line is: pStaticWnd->SetIcon(::LoadIcon(NULL, MAKEINTRESOURCE(IDI_SAMPLE))); Does anyone knows a way to fix it? Thanks Take a look at this page and try to give us complete information with your posts: http://guruce.com/blogpost/howtoaskquestionsonnewsgroups In particular, Windows CE version, MFC/Visual Studio version, *what* you're actually trying to do (change the icon shown on the task bar?) Paul T. > Hello, > [quoted text clipped - 13 lines] > > Thanks Ok, I´m developing in Windows CE 5.0 As I said in my post, I´m using a CStatic control to display an ICON. The CStatic class provides a method "SetIcon" to set an icon. The program compiles successful but I can't link it because of this error: error LNK2019: unresolved external symbol "public: struct HICON__ * __cdecl CStatic::SetIcon(struct HICON__ *)" >Take a look at this page and try to give us complete information with your >posts: [quoted text clipped - 11 lines] >> >> Thanks Ah, it wasn't clear that you meant an instance of a STATIC window by that! This appears to me to be the standard case of MFC is a piece of $#&@. You need to send the STM_SETIMAGE message to your control, passing, in the WPARAM parameter either IMAGE_ICON or IMAGE_BITMAP (icon, in your case), and the icon image in the LPARAM parameter: HICON icon = LoadIcon( g_hInst, MAKEINTRESOURCE(IDI_MYICON) ); SendDlgItemMessage( hDlg, IDC_MYSTATIC, STM_SETIMAGE, IMAGE_ICON, (LPARAM)icon ); I'm unable to figure out how you event got something to compile with a call to pStaticControl->SetIcon( icon ); As far as I can tell, the SetIcon() method should take two parameters, an HICON and a BOOL. Paul T. > Ok, > [quoted text clipped - 25 lines] >>> >>> Thanks Yes, i´m using MFC. It seems not to work on MFC. But i worked if i send STM_SETIMAGE message. Thanks!, FmF >Ah, it wasn't clear that you meant an instance of a STATIC window by that! > [quoted text clipped - 23 lines] >>>> >>>> Thanks It just means that this version of MFC, for this version of Windows CE, probably does not override SetIcon() in the CStatic class, so you're just using the one from CWindow (or is it CWnd? Stupid design). That one used WM_SETICON, which doesn't do what you want for a STATIC control. Paul T. > Yes, i´m using MFC. It seems not to work on MFC. > [quoted text clipped - 33 lines] >>>>> >>>>> Thanks I looked up deeply on the MFC source code, I think i found the problem. Here is the definition of the method SetIcon: // Window control functions _AFXWIN_INLINE CStatic::CStatic() { } WCE_DEL _AFXWIN_INLINE HICON CStatic::SetIcon(HICON hIcon) WCE_DEL { ASSERT(::IsWindow(m_hWnd)); return (HICON)::SendMessage(m_hWnd, STM_SETICON, (WPARAM)hIcon, 0L); } The macro WCE_DEL excludes the method SetIcon from MFC library. That's why it compiles successfuly but i´m not able to link the program. Anyway, it works with STM_SETIMAGE >It just means that this version of MFC, for this version of Windows CE, >probably does not override SetIcon() in the CStatic class, so you're just [quoted text clipped - 8 lines] >>>>>> >>>>>> Thanks Well done! Nice design, huh? Paul T. >I looked up deeply on the MFC source code, I think i found the problem. >Here [quoted text clipped - 25 lines] >>>>>>> >>>>>>> Thanks |
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