DrgVerifyTypeSet
This function returns the intersection of the contents of the string associated with the type-string handle for an object and an application-specified type string.
Syntax
DrgVerifyTypeSet(pDragitem, pType, cbBuflen, pBuffer)
Parameters
- pDragitem (PDRAGITEM) - input
- Pointer to the DRAGITEM structure whose hstrType is to be verified.
- pType (PSZ) - input
- String specifying the types to search for. This string is in the format: type[,type...]
- cbBuflen (ULONG) - input
- Size of the return buffer. The buffer should be at least one byte longer than the length of the string pointed to by pType. Must be > 0.
- pBuffer (PSZ) - output
- Buffer where the intersection string is returned.
Returns
- rc (BOOL) - returns
- Match indicator.
- TRUE - Successful completion.
- FALSE - Error occurred.
Remarks
If at least one of the types specified by pType is present in hstrType in the DRAGITEM structure, TRUE is returned.
Example Code
In this example, the DrgVerifyTypeSet function is used to determine whether DRT_TEXT is among the types associated with the object. If it is, the drop is accepted.
#define INCL_WINSTDDRAG /* Direct Manipulation (Drag) Functions */
#include <OS2.H>
#include <stdio.h>
#include <string.h>
BOOL flResult;
DRAGITEM pditem;
char szBuffer[32];
case DM_DRAGOVER:
flResult = DrgVerifyTypeSet(&pditem,
"DRT_TEXT",
sizeof(szBuffer),
szBuffer);
flResult = strcmp(szBuffer,"DRT_TEXT");
/**************************************************************/
/* See if the object is an OS/2 file as well as being of text */
/* format. AND result flag with previous result flag to get */
/* the "effective" return code. */
/**************************************************************/
flResult = DrgVerifyRMF(&pditem,"DRM_OS2FILE","DRF_TEXT");
/**************************************************************/
/* See if DRT_TEXT is the true type of the object */
/**************************************************************/
flResult = DrgVerifyTrueType(&pditem,"DRF_TEXT");
if(!flResult)
/**************************************************************/
/* Inform the application that you will accept the drop */
/**************************************************************/
return(MRFROM2SHORT(DOR_DROP, DO_COPY));
break;