DrgQueryDraginfoPtrFromHwnd: Difference between revisions
Created page with "This function determines whether a particular window has allocated a DRAGINFO structure. ==Syntax== DrgQueryDraginfoPtrFromHwnd(hwndSource) ==Parameters== ;hwndSource (HWND) - input: Handle of the window whose associated DRAGINFO pointer is to be returned. ==Returns== ;pDraginfo (PDRAGINFO) - returns: Pointer to the DRAGINFO structure allocated by the window specified by hwndSource. :: If the return value is NULL, the DRAGINFO structure has not been allocated..." |
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Latest revision as of 00:23, 8 April 2025
This function determines whether a particular window has allocated a DRAGINFO structure.
Syntax
DrgQueryDraginfoPtrFromHwnd(hwndSource)
Parameters
- hwndSource (HWND) - input
- Handle of the window whose associated DRAGINFO pointer is to be returned.
Returns
- pDraginfo (PDRAGINFO) - returns
- Pointer to the DRAGINFO structure allocated by the window specified by hwndSource.
- If the return value is NULL, the DRAGINFO structure has not been allocated.
Remarks
The application can gain access to the structure DRAGINFO by calling DrgAccessDraginfo.
Example Code
#define INCL_WINSTDDRAG
#include <os2.h>
HWND hwndWindow; /* Window handle */
PDRAGINFO pinfo; /* Pointer to a DRAGINFO structure */
pdinfo=DrgQueryDraginfoPtrFromHwnd(hwndWindow);
If (pdinfo) {
.
.
.
}