obtaining RECT co-ordinates in a proc

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moriman

Joined: 01 Apr 2006
Posts: 55
Location: Northern Ireland

moriman 31 Jul 2006, 15:31

Hi,

I'm trying to do the following...

Code:

.
.data
InRect    RECT
OutRect   RECT
.
.
.code
.
.
stdcall  ChgRect, InRect, OutRect
.
.
proc ChgRect rIn, rOut
        mov     eax, [rIn.top]
        .
        .
        .
endp

but when I try to compile I get [rIn.top] as an undefined symbol.

How can I transfer the RECT info to a proc?

thx

mori

31 Jul 2006, 15:31

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8263
Location: Kraków, Poland

Tomasz Grysztar 31 Jul 2006, 15:36

[rIn] is a pointer to RECT, not structure itself. The simplest way to do it is:

Code:

proc ChgRect rIn, rOut

        mov     ebx, [rIn]
        mov     eax, [ebx+RECT.top]

endp

31 Jul 2006, 15:36

moriman

Joined: 01 Apr 2006
Posts: 55
Location: Northern Ireland

moriman 31 Jul 2006, 15:40

WOW, thx for the very quick reply Tomasz Very Happy

31 Jul 2006, 15:40

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