Home Library Learn Downloads Support Community
Sign in | United States - English | |
1 out of 2 rated this helpful - Rate this topic

BN_CLICKED notification code

Applies to: desktop apps only

Sent when the user clicks a button.

The parent window of the button receives this notification code through the WM_COMMAND message.

Copy 
BN_CLICKED

    WPARAM wParam;
    LPARAM lParam;

Parameters

wParam

The LOWORD contains the button's control identifier. The HIWORD specifies the notification code.

lParam

A handle to the button.

Remarks

A disabled button does not send a BN_CLICKED notification code to its parent window.

Requirements

Minimum supported client

Windows 2000 Professional

Minimum supported server

Windows 2000 Server

Header
Winuser.h (include Windows.h)

See also

Other Resources
HIWORD
LOWORD
WM_COMMAND

 

 

Send comments about this topic to Microsoft

Build date: 3/6/2012

Did you find this helpful?
(1500 characters remaining)
Community Content Add
Annotations FAQ
Simulating a button click (ON_BN_CLICKED).
This will simulate the IDC_OK button ebing clicked.

WPARAM wParam = BN_CLICKED;
wParam = MAKEWPARAM( IDC_OK, BN_CLICKED );
LPARAM lParam = (LPARAM)GetDlgItem(IDC_OK);
BOOL bval = ::PostMessage(m_hWnd, WM_COMMAND, wParam, lParam);

**
For some reason passing NULL instead of the window handle m_hWnd did not work even though control was certainly on the same window.

-- Ajay
History