C / C++ / MFC

/*Module: MyLibFile1.cpp*/
#include <windows.h>

#define MYLIBAPI extern "C" __declspec(dllexport)

#include "MyLibFile.h"

int g_nResult;

int Add(int nLeft, int nRight)
{
	g_nResult = nLeft + nRight;
	return(g_nResult);
}

/*Module: MyLib.h*/
#ifndef MYLIBAPI

#define MYLIBAPI extern "C" __declspec(dllimport)

#endif

MYLIBAPI int g_nResult;

MYLIBAPI int Add(int nLeft, int nRight);

/*Module: MyExeFile1.cpp*/
#include <windows.h>
#include "..\MyLibFile\MyLibFile.h"

int WINAPI WinMain(HINSTANCE hinstExe, HINSTANCE, LPTSTR pszCmdLine, int)
{
	int nLeft = 10, nRight = 25;

	TCHAR sz[100];
	wsprintf(sz, TEXT("%d + %d = %d"), nLeft, nRight, Add(nLeft, nRight));
	MessageBox(GetActiveWindow(), sz, TEXT("Calculation"), MB_OK);
	DWORD Error = GetLastError();

	wsprintf(sz, TEXT("The result from the last Add is: %d"), g_nResult);
	MessageBox(NULL, sz, TEXT("Last Result"), MB_OK);
	return(0);
}

<code>
TESTHR( pCmd.CreateInstance(__uuidof(Command)) );
pCmd->CommandText = _T("sproc_thingy");
pCmd->CommandType = adCmdStoredProc;
..
..
//etc.
</code>

change 
ShellExecute( hwnd,"open",
"C:\\program files\\winamp\\winamp.exe" , 
"c:\\song.mp3", 
"c:\\program files\\winamp\\", 
SW_SHOWMINNOACTIVE ); 

ShellExecute( GetDesktopWindow(),"open",
"C:\\program files\\winamp\\winamp.exe" , 
"c:\\song.mp3", 
"c:\\program files\\winamp\\", 
SW_SHOWMINNOACTIVE );