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#define INCL_WINMESSAGEMGR
 
HWND WinWindowFromID(hwndParent, id)
HWND hwndParent;    /* parent-window handle */
USHORT id;          /* window identifier    */
 
The WinWindowFromID function returns the first child window that has the
specified identifier of the specified parent window.
 
Parameter   Description
────────────────────────────────────────────────────────────────────────────
 
hwndParent  Identifies the parent window.
 
id          Identifies the window.
 
Return Value
 
The return value is a window handle. If no child window exists with
identifier id the return value is NULL.
 
Comments
 
To obtain the window handle for an item within a dialog box, the hwndParent
parameter is set to the dialog-box window's handle and the id parameter is
set to the identifier of the item in the dialog template.
 
To obtain the window handle for a frame control, the hwndParent parameter is
set to the frame window's handle and the id parameter is set to one of the
FID constants, indicating which frame control you want a handle of.
 
The following list contains the frame control identifiers. Note that you
must also define the INCL_WINFRAMEMGR constant before including pmwin.h.
 
Value           Meaning
────────────────────────────────────────────────────────────────────────────
FID_CLIENT      Identifies the client window.
 
FID_HORZSCROLL  Identifies the horizontal scroll bar.
 
FID_MENU        Identifies the application menu.
 
FID_MINMAX      Identifies the minimize/maximize box.
 
FID_SYSMENU     Identifies the system menu.
 
FID_TITLEBAR    Identifies the title bar.
 
FID_VERTSCROLL  Identifies the vertical scroll bar.
 
Example
 
This example calls WinWindowFromID to get the window handle of the system
menu and calls WinSendMsg to send a message to disable the Close menu item.
 
#define INCL_WINMESSAGEMGR   /* includes message manager functions */
#define INCL_WINFRAMEMGR     /* includes FID_ constants            */
#include <os2.h>
 
HWND hwndSysMenu;
 
hwndSysMenu = WinWindowFromID(hwndDlg, FID_SYSMENU);
WinSendMsg(hwndSysMenu, MM_SETITEMATTR,
    MPFROM2SHORT(SC_CLOSE, TRUE),
    MPFROM2SHORT(MIA_DISABLED, MIA_DISABLED));
 
See Also
 
WinMultWindowFromIDs, WinWindowFromPoint
 
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