WindowDCHook

This hook is called when a device context is allocated or freed.

Syntax

WindowDCHook(hab, hdc, hwnd, flAssociate);

Parameters

hab (HAB) - input

The application anchor block.

hdc (HDC) - input

The current device-context handle.

hwnd (HWND) - input

The current window handle.

flAssociate (BOOL) - input

Association flag.

TRUE: Device context has been allocated.

FALSE: Device context has been freed.

rc (BOOL) - returns

Success indicator.

TRUE: Successful completion.

FALSE: Errors occurred.

Returns

rc (BOOL) - returns

Success indicator.

TRUE: Successful completion.

FALSE: Errors occurred.

Example Code

#define INCL_WINHOOKS /* Or use INCL_WIN, INCL_PM, */
#include <os2.h>

HAB  hab;         /* The application anchor block. */
HDC  hdc;         /* The current device-context handle. */
HWND hwnd;        /* The current window handle. */
BOOL flAssociate; /* Association flag. */
BOOL rc;          /* Success indicator. */

rc = WindowDCHook(hab, hdc, hwnd, flAssociate);