gistfile1.txt

.assembly extern mscorlib
{
  .publickeytoken = (B7 7A 5C 56 19 34 E0 89 )
  .ver 1:0:3300:0
}
.assembly HelloWorld
{
  .hash algorithm 0x00008004
  .ver 0:0:0:0
}
.module HelloWorld.dll
.imagebase 0x00400000
.subsystem 0x00000003
.file alignment 512


.corflags 0x00000002				// ### CHANGE #### -> Change Image CoreFlag to COMIMAGE_FLAGS_32BITSREQUIRED to fix the potential WinXP pitfall
.vtfixup [1] int32 fromunmanaged at VT_01	// ### CHANGE #### -> Create a VTable entry wich will contain the needed data to identify our function
.data VT_01 = int32(0)				// ### CHANGE #### -> Create a data entry to hold the Virtual Address to our function

.namespace HelloWorldDll
{
  .class public auto ansi beforefieldinit HelloWorldClass extends [mscorlib]System.Object{}
}

.namespace HelloWorldDll
{
  .class public auto ansi beforefieldinit HelloWorldClass extends [mscorlib]System.Object
  {
    .method public hidebysig static string SayHello(string name) cil managed
    {
	.vtentry 1 : 1				// ### CHANGE #### -> Specify wich VTable entry to use for this function
	.export [1] as SayHello			// ### CHANGE #### -> Export the method as unmanaged code with the alias "SayHello"

      .maxstack  2
      .locals init (string V_0)
      IL_0000:  ldstr      "Hello "
      IL_0005:  ldarg.0
      IL_0006:  call       string [mscorlib]System.String::Concat(string, string)
      IL_000b:  stloc.0
      IL_000c:  br.s       IL_000e

      IL_000e:  ldloc.0
      IL_000f:  ret
    }

    .method public hidebysig specialname rtspecialname instance void  .ctor() cil managed
    {
      .maxstack  1
      IL_0000:  ldarg.0
      IL_0001:  call       instance void [mscorlib]System.Object::.ctor()
      IL_0006:  ret
    }
  }
}