pinvoke - Passing multiple parameters using CreateRemoteThread in C# -

my goal call function in remote process using p/invoke in c# (createremotethread). problem function takes more 1 parameter. there way pass multiple parameters function?

[dllimport("kernel32.dll", setlasterror = true, exactspelling = true)] static extern intptr openprocess(int dwdesiredaccess, bool binherithandle, int dwprocessid);  [dllimport("kernel32.dll", setlasterror = true, exactspelling = true)] static extern intptr virtualallocex(intptr hprocess, intptr lpaddress, uint dwsize, allocationtype flallocationtype, memoryprotection flprotect);  [dllimport("kernel32.dll", setlasterror = true)] static extern bool writeprocessmemory(intptr hprocess, intptr lpbaseaddress, intptr lpbuffer, uint nsize, out uintptr lpnumberofbyteswritten);  [flags] public enum allocationtype {     commit = 0x1000,     reserve = 0x2000,     decommit = 0x4000,     release = 0x8000,     reset = 0x80000,     physical = 0x400000,     topdown = 0x100000,     writewatch = 0x200000,     largepages = 0x20000000 }  [flags] public enum memoryprotection {     execute = 0x10,     executeread = 0x20,     executereadwrite = 0x40,     executewritecopy = 0x80,     noaccess = 0x01,     readonly = 0x02,     readwrite = 0x04,     writecopy = 0x08,     guardmodifierflag = 0x100,     nocachemodifierflag = 0x200,     writecombinemodifierflag = 0x400 }  [structlayout(layoutkind.sequential, pack=1] public struct remotethreadparams {     [marshalas(unmanagedtype.u1)]     public byte param1;      [marshalas(unmanagedtype.i4)]     public int param2;      ... }  [dllimport("kernel32")] public static extern intptr createremotethread(           intptr hprocess,   intptr lpthreadattributes,   uint dwstacksize,   intptr lpstartaddress,   intptr lpparameter,   uint dwcreationflags,   out uint lpthreadid );  remotethreadparams params = new remotethreadparams(); parms.param1 = 10; parms.param2 = 200;  // allocate native heap memory in process big enough store // parameter data intptr iptrtoparams = marshal.allochglobal(marshal.sizeof(remotethreadparams));  // copies data in structure native heap memory allocated marshal.structuretoptr(params, iptrtoparams, false);  // use handle process intend create thread in. openprocess(...,...,...);  // use alloc "committed" memory addressable other process intptr iptrremoteallocatedmemory = virtualallocex()...  // copy process memory memory remoteprocess accessing writeprocessmemory(...,iptrremoteallocatedmemory,iptrtoparams,...,...);  marshal.freehglobal(iptrtoparams); // safe free, have done copy  createremotethread(...,...,...,...,iptrremoteallocatedmemory,...,...);  // free memory allocated other process...but // careful of lifetime. // // free when thread no longer accessing allocated native // memory i.e. when it's finished.  virtualfreeex(...,...,...,...); 

in c/c++ code have:

#pragma pack(push,1) struct tagremotethreadparams {     byte param1;     int param2; } remotethreadparams, *premotethreadparams; #pragma pack(pop) 

cast lpvoid received thread function premotethreadparams (i.e. *remotethreadparams).

if have "strings" want 1 of parameters, have more work marshal them across. more see:

• http://www.developerfusion.com/article/84519/mastering-structs-in-c/

some other references:

• dll injection. execute createremotethread parameter
• http://social.msdn.microsoft.com/forums/vstudio/en-us/e044a6ff-c463-4b9b-8c82-f791c35dbaa1/virtualallocexwriteprocessmemory-and-writing-c-char-arrays?forum=csharpgeneral