VS Tools Open Manual Payment Zoom

I'm trying to use VS Tools to open the manual payment zoom window but can't figure out what paramaters to send. I can get the window to open but can't get a transaction to display.

This is the function I'm calling:

PmManualPaymentsZoomForm paymentForm = Dynamics.Forms.PmManualPaymentsZoom;                        

paymentForm.Procedures.OpenWindow.Invoke(txtDocument.Text, 3, 0, 0);

I'm pretty sure I have the doc status and currency view correct but am not sure what the caller id should be (4th argument).

Thanks