glIsProgram 3G
glIsProgram determine if a name corresponds to a program object

## C Specification

GLboolean `glIsProgram` GLuint program

## Parameters

program

  Specifies a potential program object.

## Description

`glIsProgram` returns `GL_TRUE` if program is the name of a program object previously created with glCreateProgram and not yet deleted with glDeleteProgram. If program is zero or a non-zero value that is not the name of a program object, or if an error occurs, `glIsProgram` returns `GL_FALSE`.

## Notes

No error is generated if program is not a valid program object name.

A program object marked for deletion with glDeleteProgram but still in use as part of current rendering state is still considered a program object and `glIsProgram` will return `GL_TRUE`.

## See Also

glCreateProgram, glDeleteProgram, glUseProgram

## Copyright

Copyright 2003-2005 3Dlabs Inc. Ltd. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/.