private static void SetDropTip(IDataObject pdtobj, DROPIMAGETYPE type, string pszMsg, string pszInsert)
{
var dd = new DROPDESCRIPTION {
type = type, szMessage = pszMsg, szInsert = pszInsert
};
var hmem = dd.MarshalToPtr(Marshal.AllocHGlobal, out var _);
try { SetBlob(pdtobj, (short)RegisterClipboardFormat(ShellClipboardFormat.CFSTR_DROPDESCRIPTION), hmem); }
catch { Marshal.FreeHGlobal(hmem); }
}
public static void SetDescription(IDataObject dataObject, DropImageType type, string message, string insert)
{
var formatETC = new FORMATETC
{
cfFormat = (short)RegisterClipboardFormat("DropDescription"),
dwAspect = DVASPECT.DVASPECT_CONTENT,
lindex = -1,
ptd = IntPtr.Zero,
tymed = TYMED.TYMED_HGLOBAL
};
var dropDescription = new DROPDESCRIPTION
{
type = (int)type,
szMessage = message,
szInsert = insert,
};
var pointer = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(DROPDESCRIPTION)));
try
{
Marshal.StructureToPtr(dropDescription, pointer, false);
var medium = new STGMEDIUM
{
pUnkForRelease = null,
tymed = TYMED.TYMED_HGLOBAL,
unionmember = pointer,
};
dataObject.SetData(ref formatETC, ref medium, true);
}
catch
{
Marshal.FreeHGlobal(pointer);
// throw;
}
}
