用VS编写着色语言脚本时，很希望语法高亮，而非一片黑压压的代码。网上搜了一下，发现：
http://hi.baidu.com/yowsah/item/bceb342cdad7aa0e73863ef9 这篇里介绍的
NShader（ http://nshader.codeplex.com/）貌似很好用，
其支持了如下文件的关键字高亮显示：
NShader uses a specific shader language highlighting based on the following file extensions :
- .fx, .fxh, .hlsl, .vsh, .psh files : HLSL syntax highlighter.
- .glsl, .frag, .vert, .fp, .vp, .geom files : GLSL syntax highlighter.
- .cg, .cgfx, files : CG syntax highlighter.
但可惜只支持VS2008、2010.
由于项目的需要，目前小本只够安装VS2005(悲催的20G C盘啊！！）
于是乎继续寻找。
发现这篇： http://blog.csdn.net/qiul12345/article/details/6695364
比较详细地介绍了如何在VS2005中添加 Cg和HLSL 高亮语法关键词。
于是想到如法炮制，找到GLSL的关键词，将其添加进Microsoft Visual Studio 9.0\Common7\IDE下的usertype.dat文件(若没有，则自己建一个）中。
然后对VS进得一下设置。
打开 “tool”-> “options” -> “text editor” -> “file extension”，在右边的扩展名写上glsl, frag,vert，选择VC++编译器。点击Add，再ok。然后重启VS2005.
那其中的关键字有哪些呢？！ 于是下了NShader的源码，从中找到GLSLKeywords.map 文件
将其中的单词作为关键字即可。
附：关键字 （每行一个）
abs acos all any asin atan ceil clamp cos cross degrees dFdx dFdy distance dot equal exp exp2 faceforward floor fract ftransform fwidth greaterThan greaterThanEqual inversesqrt length lessThan lessThanEqual log log2 matrixcompmult max min mix mod noise1 noise2 noise3 noise4 normalize not notEqual pow radians reflect refract shadow1D shadow1DLod shadow1DProj shadow1DProjLod shadow2D shadow2DLod shadow2DProj shadow2DProjLod sign sin smoothstep sqrt step tan texelFetch texelFetchOffset texture texture1D texture1DLod texture1DProj texture1DProjLod texture2D texture2DLod texture2DProj texture2DProjLod texture3D texture3DLod texture3DProj texture3DProjLod textureCube textureCubeLod textureGrad textureGradOffset textureLod textureLodOffset textureOffset textureProj textureProjGrad textureProjGradOffset textureProjLod textureProjLodOffset textureProjOffset textureSize active asm attribute break case cast centroid class common const continue default discard do else enum extern external false filter fixed flat for foreach goto highp if in inline inout input interface invariant layout lowp mediump namespace noinline noperspective out output packed partition patch precision public return row_major sample sizeof smooth static struct subroutine superp switch template this true typedef uniform union using varying volatile while false true gl_BackColor gl_BackLightModelProduct gl_BackLightProduct gl_BackMaterial gl_BackSecondaryColor gl_ClipPlane gl_ClipVertex gl_Color gl_DepthRange gl_DepthRangeParameters gl_EyePlaneQ gl_EyePlaneR gl_EyePlaneS gl_EyePlaneT gl_Fog gl_FogCoord gl_FogFragCoord gl_FogParameters gl_FragColor gl_FragCoord gl_FragData gl_FragDepth gl_FrontColor gl_FrontFacing gl_FrontLightModelProduct gl_FrontLightProduct gl_FrontMaterial gl_FrontSecondaryColor gl_LightModel gl_LightModelParameters gl_LightModelProducts gl_LightProducts gl_LightSource gl_LightSourceParameters gl_MaterialParameters gl_MaxClipPlanes gl_MaxCombinedTextureImageUnits gl_MaxDrawBuffers gl_MaxFragmentUniformComponents gl_MaxLights gl_MaxTextureCoords gl_MaxTextureImageUnits gl_MaxTextureUnits gl_MaxVaryingFloats gl_MaxVertexAttribs gl_MaxVertexTextureImageUnits gl_MaxVertexUniformComponents gl_ModelViewMatrix gl_ModelViewMatrixInverse gl_ModelViewMatrixInverseTranspose gl_ModelViewMatrixTranspose gl_ModelViewProjectionMatrix gl_ModelViewProjectionMatrixInverse gl_ModelViewProjectionMatrixInverseTranspose gl_ModelViewProjectionMatrixTranspose gl_MultiTexCoord0 gl_MultiTexCoord1 gl_MultiTexCoord10 gl_MultiTexCoord11 gl_MultiTexCoord2 gl_MultiTexCoord3 gl_MultiTexCoord4 gl_MultiTexCoord5 gl_MultiTexCoord6 gl_MultiTexCoord7 gl_MultiTexCoord8 gl_MultiTexCoord9 gl_Normal gl_NormalMatrix gl_NormalScale gl_ObjectPlaneQ gl_ObjectPlaneR gl_ObjectPlaneS gl_ObjectPlaneT gl_Point gl_PointParameters gl_PointSize gl_Position gl_ProjectionMatrix gl_ProjectionMatrixInverse gl_ProjectionMatrixInverseTranspose gl_ProjectionMatrixTranspose gl_SecondaryColor gl_TexCoord gl_TextureEnvColor gl_TextureMatrix gl_TextureMatrixInverse gl_TextureMatrixInverseTranspose gl_TextureMatrixTranspose gl_Vertex bool bvec2 bvec3 bvec4 dmat2 dmat2x2 dmat2x3 dmat2x4 dmat3 dmat3x2 dmat3x3 dmat3x4 dmat4 dmat4x2 dmat4x3 dmat4x4 double dvec2 dvec3 dvec4 float fvec2 fvec3 fvec4 half hvec2 hvec3 hvec4 int isampler1D isampler1DArray isampler2D isampler2DArray isampler2DMS isampler2DMSArray isampler2DRect isampler3D isamplerBuffer isamplerCube isamplerCubeArray ivec2 ivec3 ivec4 long mat2 mat2x2 mat2x3 mat2x4 mat3 mat3x2 mat3x3 mat3x4 mat4 mat4x2 mat4x3 mat4x4 sampler1D sampler1DArray sampler1DArrayShadow sampler1DShadow sampler2D sampler2DArray sampler2DArrayShadow sampler2DMS sampler2DMSArray sampler2DRect sampler2DRectShadow sampler2DShadow sampler3D sampler3DRect samplerBuffer samplerCube samplerCubeArray samplerCubeArrayShadow samplerCubeShadow short uint unsigned usampler1D usampler1DArray usampler2D usampler2DArray usampler2DMS usampler2DMSArray usampler2DRect usampler3D usamplerBuffer usamplerCube usamplerCubeArray uvec2 uvec3 uvec4 vec2 vec3 vec4 void