How to configure mspaint on Windows Server 2008R2/ Win 7 to start up with 1-pixel canvas or auto-crop a pasted image?

Solution 1:

Modify the script slightly to auto-crop the image.

; print screen pastes into MS-Paint
~Printscreen::
!~Printscreen::
Run Mspaint
WinActivate, Untitled - Paint
WinWaitActive, Untitled - Paint
{
   Send ^v
   Send ^+x
}

(so now it pastes the image, and then crops it)