OnCommand()

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BOOL CXXX::OnCommand(WPARAM wParam, LPARAM lParam) {<br>　　if (HIWORD(wParam) == BN_CLICKED)　　//判断是否是单击消息<br>　　{     switch (wParam)     {     case 1:         break;       case 2:         break;       case 3:         break;       case 4:         break;       case 5:         break;     }<br>　　} 　　　　return TRUE; }

CWnd::OnCommand

This method is called by the framework when the user selects an item from a menu, when a child control sends a notification message, or when an accelerator keystroke is translated.

virtual BOOL OnCommand( 
WPARAM wParam, 
LPARAM lParam );

 

Parameters

wParam

The low-order word of wParam identifies the command ID of the menu item, control, or accelerator. The high-order word of wParam specifies the notification message if the message is from a control. If the message is from an accelerator, the high-order word is 1. If the message is from a menu, the high-order word is 0.

lParam

Identifies the control that sends the message if the message is from a control. Otherwise, lParam is 0.

Return Value

An application returns nonzero if it processes this message; otherwise, it is zero.