Default Pixel Shader 3.0 for XNA

float4x4 MatrixTransform;

void SpriteVertexShader(inout float4 vColor : COLOR0, inout float2 texCoord : TEXCOORD0, inout float4 position : POSITION0)
{
    position = mul(position, MatrixTransform);
}

uniform extern texture ScreenTexture;
sampler ScreenS = sampler_state
{
    Texture = <ScreenTexture>;
};


float4 PixelShaderFunction(float2 texCoord: TEXCOORD0) : COLOR0
{
    float4 color = tex2D(ScreenS, texCoord);
    //Add shader here
    return color;

}

technique Technique1
{
    pass Pass1
    {
        VertexShader = compile vs_3_0 SpriteVertexShader();
        PixelShader = compile ps_3_0 PixelShaderFunction();
    }
}