#include <Tlhelp32.h>

BOOL IsExistProcess(CONST CHAR* szProcessName)
{
  PROCESSENTRY32 processEntry32; 
  HANDLE toolHelp32Snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,  0);
  if (((int)toolHelp32Snapshot) != -1)
  {
    processEntry32.dwSize = sizeof(processEntry32);
    if (Process32First(toolHelp32Snapshot, &processEntry32))
    {
      do
      {
        if(strcmp(szProcessName ,processEntry32.szExeFile) == 0)
        {
          return TRUE;
        }
      }while (Process32Next(toolHelp32Snapshot, &processEntry32));
    }
    CloseHandle(toolHelp32Snapshot);
  }

  return FALSE;
}

IsExistProcess("wwwwwwwwww.exe");