If you want to study ready source code, i'm happy to show you few weeks ago rewritten shader classes from nxPascal
https://code.google.com/p/nxpascal/s...c/nxGL.pas#177
TShaderSource, TShaderProgram and TGLShader are responsible of creating, loading and using the shader with OpenGL with all imaginative ways possible. Also reporting errors and compile-errors that might come up.
Usage is simple (adding error reporting there's a full demo):
Code:shader:=TGLShader.Create; shader.AddDefault3D(true); shader.Link; shader.Enable;
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