CreateDesktop

Definitions

HWINSTA NtUserGetProcessWindowStation(VOID)
HDESK   NtUserCreateDesktopEx(POBJECT_ATTRIBUTES ObjectAttributes, PUNICODE_STRING DeviceName, PDEVMODEW DeviceMode, DWORD Flags, ACCESS_MASK DesiredAccess, ULONG HeapSize);

Function

HDESK CreateDesktopNt(IN CONST PUNICODE_STRING DesktopName, 
                      IN CONST PUNICODE_STRING DeviceName, 
                      IN CONST PDEVMODEW DeviceMode, 
                      IN CONST DWORD Flags, 
                      IN CONST ACCESS_MASK DesiredAccess, 
                      IN OPTIONAL CONST LPSECURITY_ATTRIBUTES SecurityAttributes, 
                      IN CONST ULONG HeapSize)
{
    //
    // The calling process must be associated with a window station to create a desktop
    //

    CONST HWINSTA ProcessWindowStation{ NtUserGetProcessWindowStation() };

    if (ProcessWindowStation == nullptr)
    {
        return nullptr;
    }

    ULONG Attributes{ OBJ_OPENIF | OBJ_CASE_INSENSITIVE };

    if (SecurityAttributes != nullptr && SecurityAttributes->bInheritHandle == TRUE)
    {
        Attributes |= OBJ_INHERIT;
    }

    LPVOID SecurityDescriptor{};

    if (SecurityAttributes)
    {
        SecurityDescriptor = SecurityAttributes->lpSecurityDescriptor;
    }

    OBJECT_ATTRIBUTES DesktopAttributes{};

    InitializeObjectAttributes(&DesktopAttributes, DesktopName, Attributes, ProcessWindowStation, SecurityDescriptor)

    return NtUserCreateDesktopEx(&DesktopAttributes, DeviceName, DeviceMode, Flags, DesiredAccess, HeapSize);
}