Window Creation

•

What is DaniWeb IT Discussion Community?

You're currently browsing the Assembly section within the Software Development category of DaniWeb, a massive community of 402,503 software developers, web developers, Internet marketers, and tech gurus who are all enthusiastic about making contacts, networking, and learning from each other. In fact, there are 2,741 IT professionals currently interacting right now! Registration is free, only takes a minute and lets you enjoy all of the interactive features of the site.

Join our community!

Please support our Assembly advertiser: Programming Forums

•

Feb 10th, 2005

Views: 2,019

Tight_Coder_Ex

I've often wondered why M$ didn't make creating a window a simple as registering a class in that only one 32 bit value need be passed to calling routine. Although this is not ground breaking code design it does facilitate calling code only set EBX to point to all values required by CreateWindowEx.

Show Printable Version

•

asm Syntax |

Toggle Plain Text

; 				    *** CREATE_WND ***
 
;	ENTRY:	EBX = Pointer to structure CreateWindowEx structure
 
;	LEAVE:	EAX = Handle to window, or null if failed
;		 CY = 0 Successful, 1 otherwise.
 
; ============================================================================================
 
  Create_Wnd	mov	ecx, 48
		sub	esp, ecx		; Create stack frame for CreateWindowEx
		mov	edx, esp		; Need this pointer in EDI
		push	esi
		push	edi			; Save registers
		mov	edi, edx
		mov	esi, ebx		; Setup for movsd
		shr	ecx, 2			; Number of dwords to move
		cld
		rep	movsd			; Copy parameters into stack area
		pop	edi
		pop	esi			; Restore index registers and create
		call	_CreateWindowExA@48	; window
		and	eax, eax
		jnz	.Done + 1		; If non zero, then was successful
 
	; Error handling code will eventually go here
 
  .Done		stc				; Set error flag
		ret

Comments (Newest First)

vegaseat | Kickbutt Moderator | Feb 12th, 2005

•

The thread is not limited to console only. Please go ahead and give us a good one! Thanks.

Tight_Coder_Ex | Junior Poster | Feb 11th, 2005

•

I've never done anything in assembly for console, although the concept is very simple. This series I'm doing now will only have another couple of posts and it will be complete as far as displaying a window on the monitor. What I can do and what I think might be fairly informative is displaying "Hello World" in the default GUI font only while the left mouse button is being pressed at the cursor position at that time. This will be a little more consitent with my objective of this series of snippets. At that time I will post the entire source in thread18331. The complete source encorporates all the snippets I'm posting here.

vegaseat | Kickbutt Moderator | Feb 11th, 2005

•

Nice idea!
We have a little thread going on DaniWeb under: http://www.daniweb.com/techtalkforums/thread18331.html
Would be nice to get the asm Hello World! from you.

Post Comment

•

Only community members can submit or comment on code snippets. You must register or log in to contribute.

•

DaniWeb Marketplace (Sponsored Links)

DaniWeb Home > Code Snippets > asm Syntax

Window Creation