Ruby module Win32API calls win32API directly

Ruby has powerful functions. The Ruby module Win32API we will introduce here is an additional library in the Ruby language. It can help us call Win32API directly.

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Parameter 1 string Call dll name

Parameter 2 Name of the dllexport in the string dll

Parameter 3 String Array represents the type of each parameter L represents Long P represents Point I represents Int V represents Void (in actual use, HResult and various Handle are both Long and the string is P)

Parameter 4 string indicates the same type as the return value.

Ruby module Win32API sample code:

1. Require "dl/win32"
2. FindWindow = Win32API. new
   'User32. dll ', 'findwindow', % w (l p), 'l'
3. SetWindowText = Win32API. new
   'User32. dll ', 'setwindowtext ',
   % W (l p), 'I'
4. If ARGV. length = 0 then
5. Puts "usage instructions :"
6. Puts "a parameter is used to view the Form ID based on the Form title"
7. When puts are two parameters, they are queried Based on the title of parameter 1.
   Find the form and change it to the title of parameter 2"
8. Elsif ARGV. length>0 then
9. Win = FindWindow. call (0, ARGV. shift)
10. Puts win
11. If win! = 0 then
12. BSet = SetWindowText. call (win,
    ARGV. shift)
13. If bSet = 1 then
14. Puts "Success! "
15. Else
16. Puts "Fail! "
17. End
18. End
19. End

The preceding section describes how to use Win32API in Ruby.