small prob with supplying a constant

[Rainstorm]

how would i go about supplying the value returned from GetWindowLong in this code

invoke GetWindowLong, hDlg, GWL_EXSTYLE 
               invoke SetWindowLong, hDlg, GWL_EXSTYLE, WS_EX_LAYERED or eax

i get the "error constant expected"

thanks.

[jdoe]

:U

Code Select Expand



invoke GetWindowLong, hDlg, GWL_EXSTYLE
.if (eax != 0)

    or eax, WS_EX_LAYERED
    invoke SetWindowLong, hDlg, GWL_EXSTYLE, eax

.endif



[jdoe]

Maybe in that case this is better...

Code Select Expand


invoke GetWindowLong, hDlg, GWL_EXSTYLE
or eax, WS_EX_LAYERED
invoke SetWindowLong, hDlg, GWL_EXSTYLE, eax


[Rainstorm]

jdoe, thanks! i got the picture  :U

[Damos]

remember that the invoke macro unfolds to become a series of pushes followed by a call, so, you can't have 'constant or eax' because you can't 'push constant or eax'. so you would 'or eax,constant' then use eax as your parameter to invoke.

[Vortex]

Hi Rainstorm,

Another solution based on the following macro :

Code Select Expand

.
.
TEST_VALUE equ 0

Calc MACRO operation

    operation

    EXITM <eax>

ENDM

.code

start:

    xor     eax,eax
    invoke  ExitProcess,Calc(<or eax,TEST_VALUE>)

END start


[Rainstorm]

nice one, thx vortex !  :U