int IOleDropTarget.OleDragEnter(object pDataObj, int grfKeyState, long pt, ref int pdwEffect)
{
TraceDebug.Trace("OleDragEnter");
POINT pointl = new POINT();
pointl.x = DropTarget.GetX(pt);
pointl.y = DropTarget.GetY(pt);
// this shouldn't happen, but seems to occasionally, so rather than an Assertion that
// will cause a GPF, we'll try and handle it nicely....
if (lastDataObject != null)
{
// Drag leave wasn't called, so call it now...
this.owner.OnDragLeave(EventArgs.Empty);
lastDataObject = null;
this.lastEffect = DragDropEffects.None;
}
DragEventArgs e = this.CreateDragEventArgs(pDataObj, grfKeyState, pointl, pdwEffect);
if (e != null)
{
this.owner.OnDragEnter(e);
pdwEffect = (int)e.Effect;
this.lastEffect = e.Effect;
}
else
{
pdwEffect = 0;
}
return(0);
}
int IOleDropTarget.OleDragOver(int grfKeyState, long pt, ref int pdwEffect)
{
TraceDebug.Trace("OleDragOver");
POINT pointl = new POINT();
pointl.x = DropTarget.GetX(pt);
pointl.y = DropTarget.GetY(pt);
DragEventArgs e = this.CreateDragEventArgs(lastDataObject, grfKeyState, pointl, pdwEffect);
if (e != null)
{
this.owner.OnDragOver(e);
pdwEffect = (int)e.Effect;
this.lastEffect = e.Effect;
}
else
{
pdwEffect = 0;
}
return(0);
}