I am attempting to update a progress bar on a separate form.

At the moment I have a massive bit of code which constantly changes how long it takes to complete depending on the options the user selects. The code takes place in a background worker on one form. The progress bar is named PBar and I currently have it set up in increments throughout the coding to update it. I have the call method which when the code meets a progress update it will complete the update to the progress bar but this does not happen as I cannot reference the bar on the separate form called Splash.

Please could you give me some steps/ code to complete this task,
Thanks