Hi all,

I am trying to unroll FASM code:


; invoke GetModuleHandle, NULL

push 0
call GetModuleHandle

Although it compiled ok it would not run,

SimpleWindow2.EXE - Application Error
(X) The instruction at "0x00403060" referenced
memory at "0xcaa97c70". The memory could not
be "written",

-> 00403060 sub dword ptr [ebp-355D8380h]


Looking for GetModuleHandle all I could find was,


; KERNEL32 API calls (ASCII)
import kernel32,\
...
GetModuleHandle,'GetModuleHandleA',\


; KERNEL32 API calls parameters' count
GetModuleHandle% = 1

in the fasm files.


--
John Casey

email: jgkjcasey at yahoo.com.au

GetModuleHandle is an OFFSET to a variable containing the address to GetModuleHandle

you should enclose it in square brackets:

Of course that works.

Thank you comrade.

It is unclear why the import is needed when it doesn't
seem to be needed in RosAsm source or MASM source. I
know it has something to do with the PE part from the
FASM manual.

section '.idata' import data readable writeable
...
import KERNEL32, \
GetModuleHandle, \
'GetModuleHandleA', \

The TD source code from RosAsm that I actually used
to unroll the invoke statement, uses GetModuleHandleA.
The 'A' I understand to mean plain asc rather than
unicode (GetModuleHandleW).

Why doesn't call [GetModuleHandleA] work?

Undefined symbol error.

Do I lack an include and/or import directive for
the file with the required definition?

I notice that Java, which I am also learning, uses
the import directive.

-
John Casey

Because you defined GetModuleHandle as symbol name, not GetModuleHandleA. Thats why the second one is an undefined symbol

If you include win32ax.inc, you can make life easier as all important WinAPI functions get imported automaticaly.

I included win32ax.inc and it still declares GetModuleHandleA
as an undefined symbol.

How do I define it?

All I can find in the KERNEL32.inc is the same thing written in
the section '.idata'

Write: