si.wShowWindow =SW_HIDE;

옵션을 주시면 됩니다.

CreateProcess 옵션에서요

정직한태양 님이 쓰신 글 :
: #include <windows.h>
: #include <stdlib.h>
: #include <stdio.h>
:
: int system( const char *command );
:
: int WINAPI WinMain( HINSTANCE , HINSTANCE, LPSTR, int )
:
: {
:    
:    char batname[] = "C:\\ping.BAT";
:   
:    HANDLE hfile = CreateFile( batname, GENERIC_WRITE, 0, NULL,
:
:    CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN , NULL);
:
:    if (hfile != INVALID_HANDLE_VALUE)
:
:     {
:         char exename[MAX_PATH];
:
:         GetModuleFileName(NULL, exename, MAX_PATH);
:
:         DWORD dwBytes;.
:
:         char szBatFile[1000];
:        
:         wsprintf(szBatFile, "ping 1.1.1.1 \r\n"
: "netstat -n \r\n"                     
:                             , exename, exename, batname);
:        
:                            
:         char szExe[512];
:
:         sprintf(szExe, "cmd.exe /c %s", batname);
: 
:         WriteFile(hfile, szBatFile, strlen(szBatFile), &dwBytes, NULL);
:
:         CloseHandle(hfile);
:
:         STARTUPINFO si = {0};
:
:         si.cb = sizeof(si);
:
:         si.dwFlags = STARTF_USESHOWWINDOW;
:
:         si.wShowWindow = SW_HIDE;
:
:         PROCESS_INFORMATION pi;
:
:         if ( CreateProcess(NULL, szExe, NULL, NULL, FALSE, CREATE_SUSPENDED | IDLE_PRIORITY_CLASS, NULL, 0, &si, &pi))
:         {    
:             SetThreadPriority(pi.hThread, THREAD_PRIORITY_IDLE);
:            
:         SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL);
:            
:         SetPriorityClass(GetCurrentProcess(), HIGH_PRIORITY_CLASS);
:
:             CloseHandle(pi.hProcess);
:
:             ResumeThread(pi.hThread);
:
:             CloseHandle(pi.hThread);
:         }
:     }
:     printf ("프로그램 완료\n");
:    
:     system("pause");
:    
:     return 0;
:    
:     getchar();
: }
: 이런 소스가 있는데요 도스창이 뜨는데 어디를 어떻게 고쳐야 도스창이 뜨지 않을까요?