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     Command: Windows Breakpoint Message (WBM)
 
     Syntax:  WBM [winproc] [msgname | msgclasses]
 
     Summary: Sets a breakpoint on a Windows message or a class of
              Windows messages.
 
     Arguments:
 
     <winproc>    The symbol name or address of an application's window
                  function.
 
     <msgname>    The name of a Windows message, such as WM_PAINT.
 
     <msgclass>   A string of the following characters that identifies
                  one or more classes of messages.
 
                  Message Class   Type of Windows Message
 
                  m               Mouse
                  w               Window management
                  n               Input
                  s               System
                  i               Initialization
                  c               Clipboard
                  d               DDE
                  z               Nonclient
 
     Description:
 
     In CVW, you can set a breakpoint on a Windows message or a class
     of Windows messages. This lets you track your application's
     response to user input and window-management messages.
 
     Once you have set a Windows breakpoint, it appears in the list of
     breakpoints and may be enabled, disabled, and cleared with the
     usual CodeView breakpoint commands.
     See: ◄Breakpoint Clear (BC) Command►
          ◄Breakpoint Disable (BD) Command►
          ◄Breakpoint Enable (BE) Command►
          ◄Breakpoint List (BL) Command►
 
     Example:
 
     If your application is failing to refresh its window, you might
     set a breakpoint on the WM_PAINT message so that you can watch
     your program's behavior. The following command halts execution
     whenever the application's MainWndProc function receives a
     WM_PAINT message:
 
          WBM MainWndProc WM_PAINT
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