Newbie questions

• Should i always use GL_ARGB format for all textures in OpenGL?
• OpenGL: How much memory anisotropic filtered textures will use?
• C++ How to replace a function but still use the original function in it?
• How to set a value in windows registry? (C++)
• glReadPixels() really slow, better solution to get OpenGL coordinates from mouse position?
• OpenGL: How to get GPU usage percent?
• C++ new & delete and string & functions
• How to debug properly and find causes for crashes?
• How to escape sprintf() % marks so they wont be recognized as variables?
• Correct way to check if Windows is 64 bit or not, on runtime? (C++)

Newbie answers