Getting Caret Position Inside Any Application in VB 2010

I'm making a Singlish-English Word Prosessor.When user typing in a active window's TextBox those letters were automatically converted to the Sinhala language.I did that hard part with sendKeys() Function.But Now I want to set my application windows's location at Active Window's Blinking cursor(Caret) position.So It 开发者_开发技巧will easy to user with English-Sinhala Translation thing.How can I do this with VB 2010.Can any one help me.