Public Declare Function CSNull Lib "QPRO32.DLL" (ByVal Work As String) As Long
Posted on 2005-03-03
First, I just want to let you know that I am new in VB...And thx to any help...:)
I have 3 questions to ask:
1) I see a line of code calling CSNull(something). When I right-click on CSNull and chose Definition. It goes to Public Declare Function CSNull Lib "QPRO32.DLL" (ByVal Work As String) As Long
My question is how do I know what that function is doing? Is there a functions specification for QPRO32.DLL?
2) My second question is I see 2 things: frmMain, and Sub Main (in a module). When you run the application, the program runs frmMain first or Sub Main (function in the module)?
3) My 3rd question is sometimes i see something like frmMainMenu!mnuSettingShowStart.CHECKED = UNCHECKED
What does the sign "!" do in that line?
Thanks a lot.