C++ Win 32 API: Problem With Passing window SW_HIDE

I am attempting to hide a 3rd part window on bootup of our computers. I am using the following code.

#include<windows.h>
#include <stdio.h>
int main() {
    char windowName[500];
   HWND window = FindW开发者_运维技巧indow("WindowClassAsReportedByWindowSpy++", NULL);

   //GetWindowText(window, windowName, 63);
   ShowWindow(firefox,SW_HIDE);

   getchar();
   return 0;
}

The only problem is the window will not hide. Any ideas on why this isn't working /how I could accomplish this differently.

Most likely your program calls FindWindow before the target window is created, and so doesn't find it.

You'll need to sleep and retry the find.

You probably want to do sanity checks to make sure FindWindow is not returning NULL. Even better, call FindWindow in a loop until it doesn't return NULL.

#include <windows.h>
#include <stdio.h>

static const wchar_t g_cszFirefoxClass[] = L"firefox";

int __cdecl wmain(__in int argc, __in_ecount_z_opt(argc) wchar_t* _wargv[], __in_z_opt __wenviron[])
{
  UNREFERENCED_PARAMETER(argc);
  UNREFERENCED_PARAMETER(_wargv);
  UNREFERENCED_PARAMETER(__wenviron);

  HWND hWnd;

  do {
    hWnd = FindWindow(g_cszFirefoxClass, NULL);
    Sleep(100);
  } while (hWnd == NULL);

  wprintf(L"[-] Firefox found! [HWND = 0x%X]\n", hWnd);

  if (ShowWindow(hWnd, SW_HIDE))
  {
    wprintf(L"[-] Successfully hid Firefox window!\n");
    return EXIT_SUCCESS;
  }
  else
  {
    fwprintf(stderr, L"[x] Failed to hide Firefox window..\n");
    return EXIT_FAILURE;
  }
}