Windows message

[Heike]

I developed an EXE (VB.NET) which is called by a COOLlex program. Now I got the following job: if something specific happens "send a windows message with number 42" because that lets e.g. refresh a TreeView (in that COOLlex program). My question now is: how can I do that? I have no idea because I never worked with windows messages before (not in C neither in VB 6.0).
After searching everywhere in the www I seem to know that I must use the API-Function SendMessage. Does anyone have a simple example how to use it?

Thx

 

[Nerseus]

Are you trying to send a message to the COOLlex program or is it trying to send something to you?

If youre trying to send it a message, use SendMessage. Youll need the window handle (hWnd) of the window. You can get it through the API FindWindow or a similar function. This MAY not work, depending on the windows that COOLlex creates. FindWindow finds top level windows and if the one youre sending a message to is farther down, you may have to loop and find it. Assuming COOLlex is designed to be interfaced to, they should have made it pretty simple.

SendMessage also takes a message number, 42 in your case. The wParam and lParam can be 0 unless the COOLlex docs say to pass something else.

-Nerseus