WinQueryWindowModel
This function queries the memory model associated with a window.
Syntax
WinQueryWindowModel(hwnd)
Parameters
- hwnd (HWND) - input
- Window handle.
Returns
- ulModel (ULONG) - returns
- Memory model associated with the window.
- PM_MODEL_1X
- The 16-bit memory model of the 80386 processor.
- PM_MODEL_2X
- The 32-bit memory model of the 80386 processor.
Remarks
This function enables an application to query the memory model associate with a particular window to find out whether or not conversion of application-defined data is required. This may be necessary, for example, when sending DDE data. An existing OS/2 Version 1.1 or 1.2 application does not know about pointer conversion, so its data has to be converted for use in a 32-bit application.
The memory model is determined by how the window procedure was registered. If an application calls WinRegisterClass from 32-bit code, any windows created with that class are called 32-bit windows. If the application calls WinSubclassWindow from 16-bit code on a 32-bit window, that window becomes a 16-bit window.
Example Code
This example shows how to check if WinOpenWindowDC has been called for this window.
#define INCL_WINHOOKS
#define INCL_WINTHUNKAPI
#include <os2.h>
HWND hwndClient; /* window handle. */
if(WinQueryWindowModel(hwndClient) == PM_MODEL_2X)
{
/* The 32-bit memory model of the 80386 processor. */
}