Dynamically add an ATL Control

First, an ATL control must be added to generate the corresponding class.
1. contains header files.
# Include <atlctrls. h>
2. Define the resource ID
# Define idc_btn_play 6000
3. Define members in the class declaration.
Cbutton m_btnplay;
4. In the wm_create message
Rect RC1;
Rc1.left = 60;
Rc1.top = 0;
Rc1.bottom = rc1.top + 18;
Rc1.right = rc1.left + 50;
M_btnplaycreate (m_hwnd, & RC1, _ T ("stop"), ws_child | ws_visible, 0, idc_btn_play );
5. Define Click Event and message ing.
Message ing:
Begin_msg_map (cplayer)
Message_handler (wm_create, oncreate)
Command_handler (idc_btn_play, bn_clicked, onplay)
....
End_msg_map ()
Event functions:
Lresult onplay (word wnotifycode, word WID, hwnd hwndctl, bool & bhandled)
{
: MessageBox (m_hwnd, _ T ("Yes, play! "), _ T (" OK "), 0 );
Return 0;
}