I only came accross your request a year after you posted it.
I have not found and online MiFocus Cocol manuls for a long time.
One thing though is that MF Cobol is not cobol like any other. When you use NetExpress, with MF Dialog, you will be able to create windows based forms, just like you would with a 4 GL. It is a bit more cumnersome than CB or C#, but it creates good and smart GUI sytems.
You can also use it to create web pages, but it's a jit of a pain to do that.