ToolTip problem

[kenshiro55]

I have this code:

int main(char[][] params) {
	Shell shell = new Shell(DWT.SHELL_TRIM);
	shell.setVisible(true);
	ToolTip	toolTip = new ToolTip(shell, DWT.BALLOON | DWT.ICON_INFORMATION);
	toolTip.setText("Tooltip");
	toolTip.setMessage("Tooltip");
	toolTip.setLocation(200, 200);
	toolTip.setVisible(true);
	toolTip.setAutoHide(true);
	Display display = shell.getDisplay();	
	shell.setVisible(true);
	shell.setSize(200, 200);  
	while (!shell.isDisposed()) {
		if (!display.readAndDispatch()) {
			display.sleep();
		}
	}
	display.dispose();
	return 0;
}


The tooltip is hidden if I move the window or after a while.

Buf if I include a manifest using:
  - dwt.res and the buildflag -L/rc:dwt
  - or if a file test.exe.manifest is present
the tooltip don't disappear.

What can I do to make it work ?

Tested with dmd 1.0.28, dwt-win 2008-07-21 and tango 0.99.6.