PRB: OnLButtonDblClk() Not Called in Windows CE (185281)
The information in this article applies to:
- Microsoft Visual C++ for Windows CE 1.0
- Microsoft Visual C++ for Windows CE 2.0
This article was previously published under Q185281 SYMPTOMS
Message handlers for the WM_LBUTTONDBLCLK, WM_RBUTTONDBLCLK and
WM_MBUTTONDBLCLK messages are not called for a Microsoft Foundation Classes
(MFC) application running in the Windows CE emulation environment or on a
handheld PC (H/PC).
CAUSE
For a window to receive the WM_LBUTTONDBLCLK, WM_RBUTTONDBLCLK, or
WM_MBUTTONDBLCLK messages, the class definition of the window must include
the CS_DBLCLKS style. By default, MFC does not add the CS_DBLCLKS style to
the class definition that it uses for single document interface (SDI) frame
windows and views on the Windows CE platform.
RESOLUTION
To work around this problem, register a new class that includes the
CS_DBLCLKS style and use this new class when you create the window. You can
do this in the PreCreateWindow() method of the window that handles the
double-click messages, as in the following code:
Sample Code BOOL CtestView::PreCreateWindow(CREATESTRUCT& cs)
{
if (CView::PreCreateWindow(cs))
{
WNDCLASS wc;
// Get the class information for the default MFC view class.
::GetClassInfo(AfxGetInstanceHandle(),cs.lpszClass,&wc);
// Register a new class using the attributes of the default
// view class, and make it the new default class.
cs.lpszClass = AfxRegisterWndClass(wc.style | CS_DBLCLKS,
wc.hCursor,wc.hbrBackground,wc.hIcon);
return TRUE;
}
return FALSE;
}
STATUS
This behavior is by design.
| Modification Type: | Major | Last Reviewed: | 10/2/2003 |
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| Keywords: | kbprb KB185281 |
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