some questions about the example code "fasmcam.zip"

flat assembler
Message board for the users of flat assembler.

Index > Windows > some questions about the example code "fasmcam.zip"

Author

Thread

towry

Joined: 15 Aug 2012
Posts: 2

towry 15 Aug 2012, 15:18

Code:

 WM_CAP_SET_PREVIEWRATE       =  WM_USER + 52
  WM_CAP_SET_SCALE             =  WM_USER + 53
  ID_START                     =  201
  ID_STOP                      =  202
  ID_CLICK                     =  203
  _camtitle                    db 'FASMWEBCAM'
;........
;somthing
;........
 cmp     [wparam], BN_CLICKED shl 16 + ID_START  ; I don't understand what's this mean !!!!
      je      .startbutton

I have searched this question on google, but got nothing.
is BN_CLICKED a constant? what's the value?
btw,my english is not good.. Embarassed

15 Aug 2012, 15:18

bzdashek

Joined: 15 Feb 2012
Posts: 147
Location: Tolstokvashino, Russia

bzdashek 15 Aug 2012, 15:30

It's macro-constant,
see file:
FASM\INCLUDE\EQUATES\USER32.INC

Code:

BN_CLICKED    = 0

15 Aug 2012, 15:30

towry

Joined: 15 Aug 2012
Posts: 2

towry 15 Aug 2012, 16:28

I have understood.

wParam: The LOWORD contains the button's control identifier. The HIWORD specifies the notification code.

so,BN_CLICKED shl 16 is notification code.
ID_START is the button's control identifier.
Thanks very much!

15 Aug 2012, 16:28

bzdashek

Joined: 15 Feb 2012
Posts: 147
Location: Tolstokvashino, Russia

bzdashek 17 Aug 2012, 21:30

You're welcome!

17 Aug 2012, 21:30

< Last Thread | Next Thread >

Forum Rules:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum