opengl is an application used to basiclly play video games, same thing as DirectX, my suggestion is to change your graphics from opengl to directx, or try going here and downloading this and putting it either your warcraft 3 folder, or somewhere in the windows folder im not sure where or if it tells u a specific folder where it cant find it, put it there http://www.dll-files.com/dllindex/download.php?opengl32download0UGdPIaMlQ
try putting it in "C:\WINDOWS\system32" thats where i found mine, should of seen that before derrrrrrrr, it has the "32" hangin right on the back of its name, sry im stupid