The MASM Forum Archive 2004 to 2012

Hello,
I'm now learning how to develop graphical apps, but i'm getting a error when using DialogBoxParam, see my code:
.386
.model flat, stdcall
option casemap:none

include \masm32\include\windows.inc
include \masm32\include\user32.inc
include \masm32\include\kernel32.inc
include \masm32\include\comctl32.inc
include \masm32\include\winmm.inc

includelib \masm32\lib\user32.lib
includelib \masm32\lib\kernel32.lib
includelib \masm32\lib\comctl32.lib
includelib \masm32\lib\winmm.lib

ID_BUTTON1 equ 201

.data
        hInstance   dd ?
        dlgname     db "MAINSCREEN",0


.data?
        icex INITCOMMONCONTROLSEX <> ;structure for Controls

.code

start proc
        invoke GetModuleHandle,NULL
        mov hInstance,eax
        mov icex.dwSize,sizeof INITCOMMONCONTROLSEX
        mov icex.dwICC,ICC_DATE_CLASSES
        invoke InitCommonControlsEx,ADDR icex
        invoke DialogBoxParam,hInstance,ADDR dlgname,0,ADDR Dialog,0
        invoke ExitProcess,eax
Ret
start EndP

Dialog proc hWin:DWORD, uMsg:DWORD, aParam:DWORD, bParam:DWORD
        .if uMsg == WM_COMMAND
                                    mov eax,aParam
               
                .if eax == ID_BUTTON1
                invoke SendMessage,hWin,WM_CLOSE,NULL,NULL
                .endif
        .elseif uMsg == WM_CLOSE
                                invoke EndDialog,hWin,NULL
        .endif
        xor eax,eax
Ret
Dialog EndP
End start
And the compiler log:
D:\Masm32\Bin\ML /c /coff /Cp /nologo /I"D:\Masm32\Include" "D:\Test Dialog\test.asm"

Assembling: D:\Test Dialog\test.asm
D:\Test Dialog\test.asm(34) : error A2006: undefined symbol : Dialog
D:\Test Dialog\test.asm(34) : error A2114: INVOKE argument type mismatch : argument : 4

D:\Masm32\Bin\Link @"D:\Test Dialog\link.war"

Microsoft (R) Incremental Linker Version 5.12.8078
Copyright (C) Microsoft Corp 1992-1998. All rights reserved.

/SUBSYSTEM:WINDOWS /RELEASE /VERSION:4.0 "/LIBPATH:D:\Masm32\Lib" "D:\Test Dialog\test.obj" "D:\Test Dialog\test.res" "/OUT:D:\Test Dialog\test.exe"
LINK : fatal error LNK1181: cannot open input file "D:\Test Dialog\test.obj"

Make finished. 3 error(s) occured.

Best Regards,
Nathan Paulino Campos

You need to prototype that procedure.

Dialog PROTO :DWORD,:DWORD,:DWORD,:DWORD

Place that line right after your include statements. When you fix that error, the object file will be successfully created and the errors should disappear.

Paul

Thanks very much PBrennick! :)