public static int DoDragDropHook(NativeMethods.IDataObject pDataObj, NativeMethods.IDropSource pDropSource, uint dwOKEffects, uint[] pdwEffect)
{
try
{
log.Info("Drag started");
if (!DataObjectHelper.GetDataPresent(pDataObj, "FileGroupDescriptorW"))
{
log.Info("No virtual files found -- continuing original drag");
return(NativeMethods.DoDragDrop(pDataObj, pDropSource, dwOKEffects, pdwEffect));
}
//Start new drag
log.Info("Virtual files found -- starting new drag adding CF_HDROP format");
log.InfoFormat("Files: {0}", string.Join(",", DataObjectHelper.GetFilenames(pDataObj)));
NativeMethods.IDataObject newDataObj = new OutlookDataObject(pDataObj);
int result = NativeMethods.DoDragDrop(newDataObj, pDropSource, dwOKEffects, pdwEffect);
//Get result
log.InfoFormat("DoDragDrop result: {0}", result);
return(result);
}
catch (Exception ex)
{
log.Warn("Dragging error", ex);
return(NativeMethods.DRAGDROP_S_CANCEL);
}
}
public static int DoDragDropHook(NativeMethods.IDataObject pDataObj, IntPtr pDropSource, uint dwOKEffects, out uint pdwEffect)
{
try
{
log.Info("Drag started");
if (!DataObjectHelper.GetDataPresent(pDataObj, "FileGroupDescriptorW") && !DataObjectHelper.GetDataPresent(pDataObj, "FileGroupDescriptor"))
{
log.Info("No virtual files found -- continuing original drag");
return(NativeMethods.DoDragDrop(pDataObj, pDropSource, dwOKEffects, out pdwEffect));
}
//Start new drag
log.Info("Virtual files found -- starting new drag adding CF_HDROP format");
log.InfoFormat("Files: {0}", string.Join(",", DataObjectHelper.GetFilenames(pDataObj)));
OutlookDataObject newDataObj = new OutlookDataObject(pDataObj);
int result = NativeMethods.DoDragDrop(newDataObj, pDropSource, dwOKEffects, out pdwEffect);
//If files were dropped and drop effect was "move", then override to "copy" so original item is not deleted
if (newDataObj.FilesDropped && pdwEffect == NativeMethods.DROPEFFECT_MOVE)
{
pdwEffect = NativeMethods.DROPEFFECT_COPY;
}
//Get result
log.InfoFormat("DoDragDrop effect: {0} result: {1}", pdwEffect, result);
return(result);
}
catch (Exception ex)
{
log.Warn("Dragging error", ex);
pdwEffect = NativeMethods.DROPEFFECT_NONE;
return(NativeMethods.DRAGDROP_S_CANCEL);
}
}
