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Need some simple help?

Started by rafaelinio, November 28, 2015, 03:30:28 AM

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rafaelinio

Hey guys, just joined this forum.
I tried to compile the following code in masm:

.386
.model flat,stdcall
option casemap:none

WinMain proto :DWORD,:DWORD,:DWORD,:DWORD

include \masm32\include\windows.inc
include \masm32\include\user32.inc
include \masm32\include\kernel32.inc
includelib \masm32\lib\user32.lib
includelib \masm32\lib\kernel32.lib

.DATA
    ClassName db "SimpleWinClass",0
    AppName  db "Our First Window",0

.DATA?
    hInstance HINSTANCE ?
    CommandLine LPSTR ?

.CODE
start:
    invoke GetModuleHandle, NULL
    mov    hInstance,eax
    invoke GetCommandLine
    mov    CommandLine,eax
    invoke WinMain, hInstance,NULL,CommandLine, SW_SHOWDEFAULT
    invoke ExitProcess,eax
end start

But i get an error when i try to create the exe(it assembles just fine) "unresolved external symbol _WinMain@16
Thanks :p
oh, and whats up with the quiz i have to take to post anything? xD

hutch--

Where is your WinMain ?

RE: Quiz, its there to slow up spammers, it goes away after a number of postings. We get rid of spammers before they reach that post count.

rafaelinio

Thanks for the quick reply
Oh, it's probably later in Iczelions tutorial xD wanted to see if it works.

.386
.model flat,stdcall
option casemap:none
include \masm32\include\windows.inc
include \masm32\include\user32.inc
includelib \masm32\lib\user32.lib            ; calls to functions in user32.lib and kernel32.lib
include \masm32\include\kernel32.inc
includelib \masm32\lib\kernel32.lib

WinMain proto :DWORD,:DWORD,:DWORD,:DWORD

.DATA                     ; initialized data
ClassName db "SimpleWinClass",0        ; the name of our window class
AppName db "Our First Window",0        ; the name of our window

.DATA?                ; Uninitialized data
hInstance HINSTANCE ?        ; Instance handle of our program
CommandLine LPSTR ?
.CODE                ; Here begins our code
start:
invoke GetModuleHandle, NULL            ; get the instance handle of our program.
                                                                       ; Under Win32, hmodule==hinstance mov hInstance,eax
mov hInstance,eax
invoke GetCommandLine                        ; get the command line. You don't have to call this function IF
                                                                       ; your program doesn't process the command line.
mov CommandLine,eax
invoke WinMain, hInstance,NULL,CommandLine, SW_SHOWDEFAULT        ; call the main function
invoke ExitProcess, eax                           ; quit our program. The exit code is returned in eax from WinMain.

WinMain proc hInst:HINSTANCE,hPrevInst:HINSTANCE,CmdLine:LPSTR,CmdShow:DWORD
    LOCAL wc:WNDCLASSEX                                            ; create local variables on stack
    LOCAL msg:MSG
    LOCAL hwnd:HWND

    mov   wc.cbSize,SIZEOF WNDCLASSEX                   ; fill values in members of wc
    mov   wc.style, CS_HREDRAW or CS_VREDRAW
    mov   wc.lpfnWndProc, OFFSET WndProc
    mov   wc.cbClsExtra,NULL
    mov   wc.cbWndExtra,NULL
    push  hInstance
    pop   wc.hInstance
    mov   wc.hbrBackground,COLOR_WINDOW+1
    mov   wc.lpszMenuName,NULL
    mov   wc.lpszClassName,OFFSET ClassName
    invoke LoadIcon,NULL,IDI_APPLICATION
    mov   wc.hIcon,eax
    mov   wc.hIconSm,eax
    invoke LoadCursor,NULL,IDC_ARROW
    mov   wc.hCursor,eax
    invoke RegisterClassEx, addr wc                       ; register our window class
    invoke CreateWindowEx,NULL,\
                ADDR ClassName,\
                ADDR AppName,\
                WS_OVERLAPPEDWINDOW,\
                CW_USEDEFAULT,\
                CW_USEDEFAULT,\
                CW_USEDEFAULT,\
                CW_USEDEFAULT,\
                NULL,\
                NULL,\
                hInst,\
                NULL
    mov   hwnd,eax
    invoke ShowWindow, hwnd,CmdShow               ; display our window on desktop
    invoke UpdateWindow, hwnd                                 ; refresh the client area

    .WHILE TRUE                                                         ; Enter message loop
                invoke GetMessage, ADDR msg,NULL,0,0
                .BREAK .IF (!eax)
                invoke TranslateMessage, ADDR msg
                invoke DispatchMessage, ADDR msg
   .ENDW
    mov     eax,msg.wParam                                            ; return exit code in eax
    ret
WinMain endp

WndProc proc hWnd:HWND, uMsg:UINT, wParam:WPARAM, lParam:LPARAM
    .IF uMsg==WM_DESTROY                           ; if the user closes our window
        invoke PostQuitMessage,NULL             ; quit our application
    .ELSE
        invoke DefWindowProc,hWnd,uMsg,wParam,lParam     ; Default message processing
        ret
    .ENDIF
    xor eax,eax
    ret
WndProc endp

end start

This is the final code, would this work without the error?

dedndave

it may be helpful to also PROTOtype WndProc

WinMain proto :HINSTANCE,:HINSTANCE,:LPSTR,:DWORD
WndProc proto :HWND,:UINT,:WPARAM,:LPARAM