Using NinjaTrader, I would like to send keyboard HotKey commands to the desktop to control screen or multi-screen captures programmatically. Can someone guide me on how to get started on this project?

Thanks,
taddypole...

Taddypole 

Using NinjaTrader, I would like to send keyboard HotKey commands to the desktop to control screen or multi-screen captures programmatically. Can someone guide me on how to get started on this project? Thanks, taddypole...

I'd look at this method:
https://learn.microsoft.com/en-us/dotnet/api/system.windows.forms.sendkeys?view=windowsdesktop-7.0

ex.: sending a hot key to the current chart
System.Windows.Forms.SendKeys.SendWait("{F5}");

You should also look at these other methods:
FindWindow and SetForegroundWindow, to force focus on other applications.