dll code dll.h:

Code:
#ifndef _DLL_H_
#define _DLL_H_

#if BUILDING_DLL
# define DLLIMPORT __declspec (dllexport)
#else /* Not BUILDING_DLL */
# define DLLIMPORT __declspec (dllimport)
#endif /* Not BUILDING_DLL */


class DLLIMPORT DllClass
{
  public:
    DllClass();
    virtual ~DllClass(void);

  private:

};


#endif /* _DLL_H_ */

typedef struct
{
 DWORD mVersion;
 HWND mHwnd;
 BOOL mKeep;
} LOADINFO;


the .cpp file
Code:
#include <windows.h>
#include "dll.h"

DllClass::DllClass()
{

}


DllClass::~DllClass ()
{

}


BOOL APIENTRY DllMain (HINSTANCE hInst     /* Library instance handle. */ ,
                       DWORD reason        /* Reason this function is being called. */ ,
                       LPVOID reserved     /* Not used. */ )
{
    switch (reason)
    {
      case DLL_PROCESS_ATTACH:
        break;

      case DLL_PROCESS_DETACH:
        break;

      case DLL_THREAD_ATTACH:
        break;

      case DLL_THREAD_DETACH:
        break;
    }

    /* Returns TRUE on success, FALSE on failure */
    return TRUE;
}

//Define mIRC Variables
HWND mIRC_hwnd;
LPSTR mData;
HANDLE hFileMap;

// Token stuff
char* gettok(char *data, int pos, char *C, int all)
{
    char*  Token;
    int    i;
    char data2[1024];
    lstrcpy(data2,data);
    Token = strtok(data2,C);
    for (i = 1; Token && (i < pos); i++) {

      if (i == (pos-1) && all) return strtok(NULL,"");
      else Token = strtok(NULL,C);
    }
    if (all) return strtok(data,"");
    //if (!Token)
    //  lstrcpy(Token,"\0");
    return Token;
}

int numtok(char *data, char *C)
{
    char* Token;
    char data2[1024];
    int i = 0;
    lstrcpy(data2,data);
    Token = strtok(data2,C);
    while (Token) {
      Token = strtok(NULL,C);
      i++;
    }
    return i;
}

//Define Function for mIRC to call
extern "C" __declspec(dllexport) void __stdcall LoadDll(LOADINFO *);
extern "C" __declspec(dllexport) int __stdcall UnloadDll(int);
extern "C" __declspec(dllexport) int __stdcall SetWParent(HWND mWnd, HWND aWnd, char *data, char *parms, BOOL show, BOOL nopause);

//Define The Functions
void __stdcall LoadDll(LOADINFO *li)
{
 hFileMap = CreateFileMapping(INVALID_HANDLE_VALUE,0,PAGE_READWRITE,0,4096,"mIRC");     
 mData = (LPSTR)MapViewOfFile(hFileMap,FILE_MAP_ALL_ACCESS,0,0,0);
 mIRC_hwnd = li->mHwnd;
 li->mKeep = FALSE;
}

int __stdcall UnloadDll(int mTimeout)
{
	if (!mTimeout) 
	{ 
      UnmapViewOfFile(mData);
      CloseHandle(hFileMap);
      return 1; 
	}
    return 0;
}

int __stdcall SetWParent(HWND mWnd, HWND aWnd, char *data, char *parms, BOOL show, BOOL nopause)
{
 HWND child = (HWND)atoi(gettok(data,1," ",0));
 HWND owner = (HWND)atoi(gettok(data,2," ",0));

 if ((IsWindow(child)) && (IsWindow(owner))) { SetParent(child,owner); }
 return 1;
}


like previously stated, works great on the non-unicode versions of mIRC. gives me the ability to individually make windows desktop or not without having to mark types as automatic desktop windows.