Hi! All, Suppose, in my game somewhere I have set values in glOrtho(..,). Now I want to get the values I have set previously. Please I don't want to keep values in some variables to get them later. Help Thanks in advance.

Keeping the variables IS the easiest solution, and you better have a really good reason not to do so. But you can always get the resulting matrix back and solve for the values you are interested in. The matrix generated is available in pretty much any documentation you can find.