in windows platform, you can press 'PRINT' key to cature the screen.
system will copy the screen to clipboard and then you can paste it to word or powerpoint.
I suspect that you will have to contact the source of your program. I suspect that it has a screen buffer independent of the computer system which is why the ordinary screen capture programs will not get all of the data.
If you use ModelSim software..it has a built in feature that prints the wave file into postscripts...See if your simulator also supports something like this