/// <summary>
/// Sets the drop description for the drag image manager.
/// </summary>
/// <param name="dataObject">The DataObject to set.</param>
/// <param name="dropDescription">The drop description.</param>
public static void SetDropDescription(this IDataObject dataObject, DropDescription dropDescription) {
FORMATETC formatETC;
FillFormatETC(DropDescriptionFormat, TYMED.TYMED_HGLOBAL, out formatETC);
// We need to set the drop description as an HGLOBAL.
// Allocate space ...
IntPtr pDD = Marshal.AllocHGlobal(Marshal.SizeOf(typeof (DropDescription)));
try {
// ... and marshal the data
Marshal.StructureToPtr(dropDescription, pDD, false);
// The medium wraps the HGLOBAL
STGMEDIUM medium;
medium.pUnkForRelease = null;
medium.tymed = TYMED.TYMED_HGLOBAL;
medium.unionmember = pDD;
// Set the data
IDataObject dataObjectCOM = dataObject;
dataObjectCOM.SetData(ref formatETC, ref medium, true);
}
catch {
// If we failed, we need to free the HGLOBAL memory
Marshal.FreeHGlobal(pDD);
throw;
}
}
/// <summary>
/// Sets the drop description for the drag image manager.
/// </summary>
/// <param name="dataObject">The DataObject to set.</param>
/// <param name="dropDescription">The drop description.</param>
public static void SetDropDescription(this IDataObject dataObject, DropDescription dropDescription)
{
FORMATETC formatETC;
FillFormatETC(DropDescriptionFormat, TYMED.TYMED_HGLOBAL, out formatETC);
// We need to set the drop description as an HGLOBAL.
// Allocate space ...
IntPtr pDD = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(DropDescription)));
try {
// ... and marshal the data
Marshal.StructureToPtr(dropDescription, pDD, false);
// The medium wraps the HGLOBAL
STGMEDIUM medium;
medium.pUnkForRelease = null;
medium.tymed = TYMED.TYMED_HGLOBAL;
medium.unionmember = pDD;
// Set the data
IDataObject dataObjectCOM = dataObject;
dataObjectCOM.SetData(ref formatETC, ref medium, true);
}
catch {
// If we failed, we need to free the HGLOBAL memory
Marshal.FreeHGlobal(pDD);
throw;
}
}
