xna - How to use shaders in MonoGame? -

can tell me, how use shaders in monogame?

i have error: https://gamedev.stackexchange.com/questions/46994/has-anyone-got-the-krypton-lighting-engine-working-in-monogame-for-windows-8

i tried use 2mgfx, tool reports: effect must contain @ least 1 technique , pass. can see myshader.fx file, does.

here shader code:

sampler texturesampler : register(s0); float _valuealpha = 1; float _valuergb = 1;  float4 main(float4 color : color0, float2 texcoord : texcoord0) : color0 {     // texture color.     float4 tex = tex2d(texturesampler, texcoord);      // convert greyscale. constants 0.3, 0.59, , 0.11 because     // human eye more sensitive green light, , less blue.     float greyscale = dot(tex.rgb, float3(0.3, 0.59, 0.11));      // input color alpha controls saturation level.     tex.rgb = lerp(greyscale, tex.rgb *_valuergb, color.a *_valuealpha);      return tex; } technique technique1 {     pass pass1     {         pixelshader = compile ps_3_0 main();     } } 

i tried changing technique technique, , pass pass, still throws "the effect must contain @ least 1 technique , pass"

i got work! :)

first of used 2mgfx tool. loaded effect this:

binaryreader reader = new binaryreader(file.open(@"content\\myshader.mgfxo", filemode.open));  myshader = new effect(graphicsdevice, reader.readbytes((int)reader.basestream.length));  

hope else too! :)

thanks!