//!!!! we have heap corruption with this method despite the fact that everything looks right.
public static bool SetFileDropPaths( List<string> lstPaths, bool fCut, IntPtr hwnd = default )
{
string str = MakeFILEOPPATHS( lstPaths );
if( /*( hwnd != IntPtr.Zero ) &&*/ ( str.Length > 1 ) )
{
if( !PI.OpenClipboard( hwnd ) )
{
return false;
}
PI.EmptyClipboard();
try
{
PI.DROPFILES structure = new PI.DROPFILES();
structure.pFiles = Marshal.SizeOf( structure );
structure.fWide = true;
int size = Marshal.SizeOf( structure ) + ( str.Length * Marshal.SystemMaxDBCSCharSize );
IntPtr hMem = PI.GlobalAlloc( 0x42, (IntPtr)size );
if( hMem != IntPtr.Zero )
{
IntPtr ptr = PI.GlobalLock( hMem );
Marshal.StructureToPtr( structure, ptr, false );
Marshal.Copy( str.ToCharArray(), 0, PtrPlus( ptr, Marshal.SizeOf( structure ) ), str.Length );
PI.GlobalUnlock( hMem );
}
IntPtr ptr3 = PI.GlobalAlloc( 0x42, (IntPtr)4 );
if( ptr3 != IntPtr.Zero )
{
IntPtr destination = PI.GlobalLock( ptr3 );
byte[] source = new byte[ 4 ];
source[ 0 ] = fCut ? ( (byte)2 ) : ( (byte)5 );
Marshal.Copy( source, 0, destination, 4 );
PI.GlobalUnlock( ptr3 );
}
if( ( hMem != IntPtr.Zero ) && ( ptr3 != IntPtr.Zero ) )
{
uint uFormat = PI.RegisterClipboardFormat( "Preferred DropEffect" );
PI.SetClipboardData( PI.CF_HDROP, hMem );
PI.SetClipboardData( uFormat, ptr3 );
return true;
}
}
finally
{
PI.CloseClipboard();
}
}
return false;
}