Loads a shader used for drawing objects. The vertex shader transforms the polygons into screen space and the pixel shader determines the final color of each pixel the object covers. Currently shaders default to GLSL version 1.10, the line "#version 110" will be automatically added as the first line of the shader unless you specify a "#version " line of your own. Note that doing this may mean your shader does not work on all devices and platforms. The global "precision" value will be added and should not be included in the shader source.
LoadShaderFromString( shaderID, szVertexSource, szPixelSource )
integer LoadShaderFromString( szVertexSource, szPixelSource )