Microsoft KB Archive/142226

= PRB: CButton SetIcon and SetBitmap Work Only Under Windows 95 =

Article ID: 142226

Article Last Modified on 11/21/2006

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APPLIES TO


 * Microsoft Foundation Class Library 4.2, when used with:
 * Microsoft Visual C++ 4.0 Standard Edition

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This article was previously published under Q142226



SYMPTOMS
When a button is displayed on Windows NT, which uses these functions and styles, the button will not appear. If you click in the area that the button should be, you will get an outline of a check-box button.



CAUSE
Windows NT does not support the BS_ICON and BS_BITMAP styles.



RESOLUTION
Only use these features of CButton when the Windows version is greater than or equal to 4.

Remove the BS_ICON or BS_BITMAP style from the dialog template. Then use GetVersion to determine the Windows version. If the version is greater than or equal to 4, use ModifyStyle to add the BS_ICON or BS_BITMAP style and call SetIcon or SetBitmap. See the "Sample Code" section of this article.

Using this method, under Windows NT the user will see the text caption version of the button, but under Windows 95 the desired icon or bitmap will be seen.



MORE INFORMATION
In the following code, m_ok is a CButton member variable, m_hIcon is a HICON member variable, and IDI_ICON1 is the ID of some icon that will be displayed under Windows 95.

Sample Code
/* compile options needed: default

BOOL CAboutDlg::OnInitDialog {   CDialog::OnInitDialog;

if ( (BYTE)GetVersion >=4 ) {       m_hIcon = AfxGetApp->LoadIcon(IDI_ICON1); if (NULL != m_hIcon) {           m_ok.ModifyStyle(0, BS_ICON); m_ok.SetIcon(m_hIcon); }   }    else m_hIcon = NULL;

return TRUE; // return TRUE unless you set the focus to a control // EXCEPTION: OCX Property Pages should return FALSE }

void CAboutDlg::OnDestroy {   CDialog::OnDestroy;

// destroy the icon if it was loaded if (NULL != m_hIcon) DestroyIcon(m_hIcon); }

