Creating Windows Messages

Hi,

I have two components which share a common class, and I want to use SendMessage to allow this class the communicate with the components.

How would I go about creating a message which I know is not being used by the system. For example, is there a limit on the default messages (a bit like the vbObjectError constant). Or can Windows itself assign me a free message id?

Thanks;

[Sam Finch]

it's actually very simple, there is a maximum limit that windows messages won't go above.

Private Const WM_USER = &H400

so when you are deciding on your window messages give them message constants such as

Private Const WM_AriadsMessage = WM_USER + 1
Private Const WM_AriadsOtherMessage = WM_USER + 2
Private Const WM_AnotherMessage = WM_USER + 3