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PFNGLACTIVETEXTUREARBPROC glActiveTextureARB=(PFNGLACTIVETEXTUREARBPROC)wglGetProcAddress("glActiveTextureARB");
if(glActiveTextureARB==NULL)
{
//...出错处理
}
const GLUbyte *version=glGetString(GL_VERSION);
//如果你检测到的版本号不小于1.3.0,则可以写以下程序
PFNGLACTIVETEXTUREPROC glActiveTexture=(PFNGLACTIVETEXTUREPROC)wglGetProcAddress("glActiveTexture");
if(glActiveTexture==NULL)
{
//出错处理
}
//在后续程序中就直接调用
glActiveTexture(texture);