Determines if the list view control has the specified group.
BOOL HasGroup( 
   int iGroupId  
) const;
Parameters
- iGroupId
The identifier of the group being requested. 
Return Value
Returns TRUE on success, FALSE on failure.
Remarks
This member function emulates the functionality of the LVM_HASGROUP message, as described in the Windows SDK.
Requirements
Header: afxcmn.h