Many many thanks for this.
I had found something somewhere else on calling API procedures but couldn't get it to work.
I had been searching for ages for something like this and am very grateful for it.
I was trying to create something in Excel that does a screen scrape of a payments system developed in-house, but one of the pages that contained the info I needed called for a right mouse click with no shortcut-key. Another thing required a mouse-click into a field that had neither an accelerator nor was it a tab-stop. So emulating a mouse move and click was the only thing I could do.
Oh the possibilities!