Manual uninstaller for PocketPC

#include <windows.h>



enum codeINSTALL_INIT {codeINSTALL_INIT_CONTINUE=0, codeINSTALL_INIT_CANCEL};
enum codeINSTALL_EXIT {codeINSTALL_EXIT_DONE=0,codeINSTALL_EXIT_UNINSTALL};
//
extern "C" __declspec(dllexport) codeINSTALL_INIT Install_Init(HWND hpar, BOOL fFirstCall, BOOL fPreviouslyInstalled, LPCTSTR pszSuggestedInstallDir)
{ // can either return "continue", or abort before we've even started the install
  return codeINSTALL_INIT_CONTINUE;
}

extern "C" __declspec(dllexport) codeINSTALL_EXIT Install_Exit(HWND hpar, LPCTSTR pszChosenInstallDir, WORD cFailedDirs, WORD cFailedFiles, WORD cFailedRegKeys, WORD cFailedRegVals, WORD cFailedShortcuts)
{ // can either return "okay", or "uninstall what we've just installed"
  // but we're going to return "okay" since it succeeded, and then delete the dummy files
  // since we intend success by this. The dummy files were just a workaround
  // around a bug in cabwiz, not a sign of failure.
  wchar_t buf[MAX_PATH]; wcscpy(buf,pszChosenInstallDir);
  wcscat(buf,L"\\ce_setup_dummyN.txt"); int len=wcslen(buf)-5;
  buf[len]='1'; DeleteFile(buf);
  buf[len]='2'; DeleteFile(buf);
  buf[len]='3'; DeleteFile(buf);
  buf[len]='4'; DeleteFile(buf);
  
  // And now continue with the main work of installing:
  MessageBox(hpar,L"Installing...",L"My App",MB_OK);
  // ...

  return codeINSTALL_EXIT_DONE;
}




enum codeUNINSTALL_INIT{codeUNINSTALL_INIT_CONTINUE=0, codeUNINSTALL_INIT_CANCEL};
enum codeUNINSTALL_EXIT {codeUNINSTALL_EXIT_DONE=0};
wchar_t install_dir[MAX_PATH];

extern "C" __declspec(dllexport) codeUNINSTALL_INIT Uninstall_Init(HWND hpar, LPCTSTR pszInstallDir)
{ // we can either return "continue", or "abort before we even start the uninstall
  // We will abort if our application is already open.
  // Note: first take this opportunity to recard the install_dir.
  // That's because we'll need to refer to it in Uninstall_Exit, but the
  // system fails to tell us it again. Hence the need to remember.
  // It's safe to to remember in a global variable, since Uninstall_Init and _Exit
  // are invoked in the same instance of the DLL.
  wcscpy(install_dir,pszInstallDir);
  //
	HWND halready = FindWindow(L"MyMainClass",L"My App");	
  if (!halready) return codeUNINSTALL_INIT_CONTINUE;
  MessageBox(hpar,L"Quit the program before uninstalling it",L"My App",MB_OK);
  return codeUNINSTALL_INIT_CANCEL;
}

extern "C" __declspec(dllexport) codeUNINSTALL_EXIT Uninstall_Exit(HWND hpar)
{ // Here we do the main work of our uninstalling:
  MessageBox(hpar,L"Uninstalling...",L"My App",MB_OK);
  // ...
  return codeUNINSTALL_EXIT_DONE;
}


BOOL WINAPI DllMain(HANDLE hMod, DWORD dwReason, LPVOID lpvReserved) {return TRUE;}