This function is called whenever a mark attribute is about to be modified (moved, resized, or edited).

Declaration:

typedef BOOL (ACCUAPI *LPFNIG_ART_PREMODIFYNOTIFYFUNC)(
        HIGEAR hIGear, 
        LPVOID lpPrivate, 
        ART_MARK_INDEX hMarkIndex, 
        const LPART_MARK_ATTRIBUTES lpMarkAttr, 
        AT_MODE nReason
);

Arguments:

Return Value:

Returns the number of ImageGear errors that occurred during the function call.

Supported Raster Image Formats:

All pixel formats supported by ImageGear for C and C++.

Sample:

None

Example:

BOOL ACCUAPI ARTPreModifyNotify( HIGEAR hIGear, 
LPVOID lpPrivate, ART_MARK_INDEX hMarkIndex, 
const LPART_MARK_ATTRIBUTES lpMarkAttr, 
AT_MODE nReason)
{
switch (nReason)
{
case ART_MODIFY_ATTRIBUTES:
    /* prevent the highlighting attribute from being */ 
 /* enabled */
 if (lpMarkAttr->bHighlighting)
    return FALSE;
}
return TRUE;
}

Remarks:

If this callback function returns FALSE, the mark does not change. Set it to TRUE to allow the mark to be modified. Upon entry, nReason is set to a constant indicating what triggered the modification. At this point your application can display one of the library's standard editing dialog boxes. "Reasons" this callback is called may be: