CreateMutex und seine Grenzen

[Patrick]

Jep, so funktioniert es! Danke.

Delphi-Quellcode:

var
  wndMain : HWND;
  FSA: SECURITY_ATTRIBUTES;
  FSD: SECURITY_DESCRIPTOR;
begin
  InitializeSecurityDescriptor(@FSD, SECURITY_DESCRIPTOR_REVISION);
  SetSecurityDescriptorDacl(@FSD, true, nil, false);
  FSA.lpSecurityDescriptor := @FSD;
  FSA.nLength := sizeof(SECURITY_ATTRIBUTES);
  FSA.bInheritHandle := true;

  mHandle := CreateMutex(@FSA, True, PWideChar('Global\' + Ident));
  if (GetLastError = ERROR_ALREADY_EXISTS) then