HandHeld Customization Question

We're starting to use handhelds for shipping. I am working on a customization on the HH MyMaterialQueue Form so shop workers can scan a part to verify that it matches whats on their queue and then have the next screen, which is the Material Move form, load automatically if it does.

I added a text box and created a sub to run on that text box_leave. If the part number matches whats on the queue then the mtl move screen should load, if it doesnt, a message box will show and put them back in the text box.

The problem is for these transaction types (STK-SHP) there is no process calling to the mtl move form like there is to the Receipt to Inventory form for MFG-STK transactions so I cant do the process calling through code because there is no custom assembly reference to add for the material move form. Have no idea why that is.

I also tried to get native control of the "Process" button but all i can figure out to do with that is to get focus. Can I click/launch that button through code? Any suggestions would be huge.