glIsProgram 3G
glIsProgram Determines 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`.

## Associated Gets

glGet with the argument `GL_CURRENT_PROGRAM`

glGetActiveAttrib with arguments program and the index of an active attribute variable

glGetActiveUniform with arguments program and the index of an active uniform variable

glGetAttachedShaders with argument program

glGetAttribLocation with arguments program and the name of an attribute variable

glGetProgram with arguments program and the parameter to be queried

glGetProgramInfoLog with argument program

glGetUniform with arguments program and the location of a uniform variable

glGetUniformLocation with arguments program and the name of a uniform variable

## See Also

glAttachShader, glBindAttribLocation, glCreateProgram, glDeleteProgram, glDetachShader, glLinkProgram, glUniform, glUseProgram, glValidateProgram

## 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/.