What’s the number 1 programming language

What is the number one programming language being used for desktop and enterprise applications today? How about in the future? What language can be used for both desktop and Internet? Which one has the highest paying jobs right now? Which language has the highest learning curve and which has the shortest?
I’m an IT professional looking to change from management into programming and need some advice as far as what language I should pursue and why? Thanks in advance, Horst.