Revert "Add user32.lib to Makefile"

This reverts commit 527e7d18dbd81f9333a05591e504bc968def7e12.
show lasterror

show lasterror
Revert "show lasterror"

This reverts commit 39d2bc9f9f80f635ecfb2c46f2409a83d907057d.
last error

It can show last error string.