wglext - extension not installed in OpenGL context

Question

I am trying to disable vsync in OpenGl with WGL_EXT_swap_control using wglSwapIntervalEXT(int interval).

I am trying to include the wglext header but after much searchin

Answer 1

Just to include header #include "gl\wglext.h" is not enough. You need to also register the extension to OpenGL. If you do not have a clue how to do it google for some tutorial but much much easier and safer is to use some extension registering library like GLEW see:

• using GLEW
• complete GL+VAO/VBO+GLSL+shaders example in C++
• Multi-texturing example at the end is download link to complete C++ GL project with GLEW source included

After successful glewInit(); call your extension should be available (if present on the gfx card/driver.

Without registering extensions you got access to only basic OpenGL 1.0 stuff.

Answer 2

So, a friend managed to figure this out without glew. So if anyone needs help with it this should be something similar to what you are looking for

void SetVSync(bool sync)  
{   
typedef BOOL(APIENTRY *PFNWGLSWAPINTERVALPROC)(int);
PFNWGLSWAPINTERVALPROC wglSwapIntervalEXT = 0;

const char *extensions = (char*)glGetString(GL_EXTENSIONS);

wglSwapIntervalEXT = (PFNWGLSWAPINTERVALPROC)wglGetProcAddress("wglSwapIntervalEXT");

if (wglSwapIntervalEXT)
    wglSwapIntervalEXT(sync);
}