Passing value from one exe to another exe

[VCProgrammer]

Hi all,

I am having two exe's, I am running one exe through another using API ShellExecute.... Now what i want is i want to pass a value from one exe to another and want to use that value in second exe. How is this possible???

Thanks in advance

[olivthill]

For instance, using the clipboard.

[VCProgrammer]

can u tell me how

[olivthill]

Okay, but I don't pretend my solution is the best one.
I use old C programming stuff. Please don't laugh at me.

static LPSTR to_clip_mem = NULL;
int put_txt_in_clipboard(HWND hwnd, char *to_clip)
{
   HANDLE hto_clip_mem;

   if (to_clip_mem != NULL)
      GlobalFree(to_clip_mem);

   to_clip_mem = (char *) GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE, to_clip_lg + 1);
   if (to_clip_mem == NULL)
      return FALSE;

   hto_clip_mem = GlobalLock(to_clip_mem);
   if (!(hto_clip_mem)) {
      GlobalFree(to_clip_mem);
      return FALSE;
   }

   lstrcpy((char *)hto_clip_mem, to_clip);

   GlobalUnlock(to_clip_mem);

   if (OpenClipboard(hwnd) == 0)
      return FALSE;
   if (EmptyClipboard() == 0) {
      CloseClipboard();
      return FALSE;
   }
   if (SetClipboardData(CF_TEXT, to_clip_mem) == NULL) {
      CloseClipboard();
      return FALSE;
   }
   if (CloseClipboard() == 0)
      return FALSE;

   return TRUE;
}

int get_txt_from_clipboard(HWND hwnd, char *from_clip, int from_clip_max)
{
   HANDLE hclip; LPSTR clip_mem; int clip_mem_lg;
   int from_clip_lg;

   if (IsClipboardFormatAvailable(CF_TEXT) == 0)
      return FALSE;
   if (OpenClipboard(hwnd) == 0)
      return FALSE;
   hclip = GetClipboardData(CF_TEXT);
   if (hclip == 0) {
      CloseClipboard();
      return FALSE;
   }
   clip_mem_lg = GlobalSize(hclip);
   if (clip_mem_lg <= 0) {
      CloseClipboard();
      return FALSE;
   }
   clip_mem = (char *)GlobalLock(hclip);
   if (clip_mem == NULL) {
      CloseClipboard();
      return FALSE;
   }
   from_clip_lg = clip_mem_lg;
   if (from_clip_lg >= from_clip_max) from_clip_lg = from_clip_max - 1;
   for (i = 0; i < from_clip_lg; i++)
      from_clip[i] = clip_mem[i];
   from_clip[i] = '\0';
   GlobalUnlock(hclip);
   if (CloseClipboard() == 0)
      return FALSE;

   return TRUE;
}

[Joeman]

well there is a simpler way. It deals with sendmessage.. that is if both of your exes run through the message queue. You use RegisterWindowMessage to register a message in both apps and process the message in each app's message queue.....

[0xC0000005]

You could also pass the value on the command line by means of ShellExecute's lpParameters string. The called program would then use ::GetCommandLine() to retrieve the value.

[VictorN]

Other possibilities: Interprocess Communications

[fransn]

sockets,named pipes, windows events + (memorymapped) files

[Arjay]

I am having two exe's, I am running one exe through another using API ShellExecute.... Now what i want is i want to pass a value from one exe to another and want to use that value in second exe. How is this possible???

Thanks in advance

What type of value is it? If it's a simple int or short string you can pass it as an argument in the command line when you fire the second process. If you to pass something else (like a structure or a large string), check out the Interprocess Communication link provided earlier.