PRB: Picture Property Not Displayed on THREED Button |
Q119905
The information in this article applies to:
- The Microsoft Foundation Classes (MFC), included with:
- Microsoft Visual C++, versions 1.0, 1.5
SYMPTOMS
When the function CVBControl::Create() is used to create a Visual Basic custom control (VBX) and a AfxSetPict() is used to set the picture property (as described in MFC Tech Note #27), the picture is not displayed.
CAUSE
There are two primary causes for this problem:
The picture property is not set properly. Corrections to MFC Tech Note #27 can be found in the following article:
Q104642 DOCERR: How to Manage VBX Picture Properties with MFC 2.0
- The BS_OWNERDRAW style was not used. This problem is discussed in this article.
RESOLUTION
Although the control will work properly, you must specify the BS_OWNERDRAW style for your picture to be displayed. For example, the standard styles that would be passed as the dwStyle parameter when calling CVBControl::Create() to create a button are as follows:
- WS_VISIBLE
- WS_CHILD
- WS_TABSTOP
- BS_OWNERDRAW
MORE INFORMATION
The sample code below shows how you can create a THREED SSCommand button with a displayed picture property.
NOTE: This problem does not occur when the control is created by the dialog manager (that is, using App Studio to place the control on a dialog-box template). The reason for this is that the BS_OWNERDRAW style is included as one of the default initialization parameters in the model style that is included in the DLGINIT resource in the .RC file.
Sample Code
/* Compile options needed: Default AppWizard options */ BOOL CAboutDlg::OnInitDialog() { CDialog::OnInitDialog(); CVBControl *pControl = new CVBControl(); pControl->Create( "THREED.VBX; SSCommand; Command3D1", WS_VISIBLE | WS_CHILD | WS_TABSTOP | BS_OWNERDRAW, CRect(10,10,50,50),this,IDC_COMMAND3D1,NULL,TRUE); HPIC hPic; HBITMAP hBmp = LoadBitmap(AfxGetInstanceHandle(), MAKEINTRESOURCE(IDB_BITMAP1)); PIC picture; picture.picData.bmp.hbitmap = hBmp; picture.picType = PICTYPE_BITMAP; hPic = AfxSetPict( NULL, &picture ); pControl->SetPictureProperty( "picture", hPic ); return TRUE; }
Additional query words: 1.00 1.50 2.00 2.50
Keywords : kb16bitonly kbprb
Issue type : kbprb
Technology : kbAudDeveloper kbMFC
Last Reviewed: May 8, 2001 |