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.
Window Creation
; *** 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
vegaseat
1,735
DaniWeb's Hypocrite
Team Colleague
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.
Tight_Coder_Ex
17
Posting Whiz in Training
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
1,735
DaniWeb's Hypocrite
Team Colleague
The thread is not limited to console only. Please go ahead and give us a good one! Thanks.
Be a part of the DaniWeb community
We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.