程序编译良好,但无法创建主窗口。具体而言,CreateWindowEx
失败并打印“无法创建窗口”。无法使用Windows API和x86汇编创建主窗口
会有人碰巧知道我在做什么错吗?我几乎完全遵循Kip Irvine关于装配的书,但似乎我错过了一些东西。
编辑:我更新了基于建议的代码。现在程序无法注册窗口类,具体错误是“参数不正确”。我查看了我的WNDCLASSEX
结构的参数,并没有任何错误。
编辑2:我从WNDCLASS
和RegisterClass
删除了“Ex”,现在窗口显示并正常工作。所以我想这是一种奇怪的重新定义或masm32rt库中的结构和函数的不一致?
INCLUDE \masm32\include\masm32rt.inc
.data
windowName BYTE "ASM Windows App",0
className BYTE "ASMWin",0
MainWinClass WNDCLASSEX <NULL,CS_HREDRAW + CS_VREDRAW,WinProc,NULL,NULL,NULL,NULL,NULL,COLOR_WINDOW+1,NULL,className,NULL>
windowHandle DWORD ?
hInstance DWORD ?
.code
WinMain PROC
; Get a handle to the current process.
INVOKE GetModuleHandle, NULL
mov hInstance, eax
mov MainWinClass.hInstance, eax
; Check if the handle was received.
.IF eax == 0
pushad
print "Failed to get handle on current process"
popad
call ErrorHandler
jmp ExitProgram
.ENDIF
; Load the program's icon and cursor.
INVOKE LoadIcon, NULL, IDI_APPLICATION
mov MainWinClass.hIcon, eax
INVOKE LoadCursor, NULL, IDC_ARROW
mov MainWinClass.hCursor, eax
; Create the window class.
INVOKE RegisterClassEx, ADDR MainWinClass
; Check if the class was registered.
.IF eax == 0
pushad
print "Failed to register class."
popad
call ErrorHandler
jmp ExitProgram
.ENDIF
; Create the window.
INVOKE CreateWindowEx, 0, ADDR className, ADDR windowName, WS_VISIBLE,
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, hInstance, NULL
; Check if window was created successfully.
.IF eax == 0
pushad
print "Failed to create window"
popad
call ErrorHandler
jmp ExitProgram
.ENDIF
; Save the window handle and use it to show the window.
mov windowHandle, eax
INVOKE ShowWindow, windowHandle, SW_SHOW
INVOKE UpdateWindow, windowHandle
; Message Loop
;MessageLoop:
; INVOKE GetMessage, ADDR msg, NULL, NULL, NULL
; INVOKE DispatchMessage, ADDR msg
; jmp MessageLoop
ExitProgram:
;CALL ReadChar
INVOKE ExitProcess, 0
WinMain ENDP
; Window Procedure
WinProc PROC,
hWnd:DWORD, localMsg:DWORD, wParam:DWORD, lParam:DWORD
mov eax, localMsg
.IF eax == WM_CREATE
;call WriteString
jmp WinProcExit
.ELSEIF eax == WM_CLOSE
;call WriteString
jmp WinProcExit
.ELSE
;call WriteString
INVOKE DefWindowProc, hWnd, localMsg, wParam, lParam
jmp WinProcExit
.ENDIF
WinProcExit:
ret
WinProc ENDP
ErrorHandler PROC
.data
pErrorMsg DWORD ?
messageID DWORD ?
.code
INVOKE GetLastError
mov messageID, eax
; Get the corresponding message string.
INVOKE FormatMessage, FORMAT_MESSAGE_ALLOCATE_BUFFER + \
FORMAT_MESSAGE_FROM_SYSTEM,NULL,messageID,NULL,
ADDR pErrorMsg,NULL,NULL
; Display the error message.
INVOKE MessageBox, NULL, pErrorMsg, NULL,
MB_ICONERROR+MB_OK
; Free the error message string.
INVOKE LocalFree, pErrorMsg
ret
ErrorHandler ENDP
END WinMain
你是什么意思,它没有创建主窗口? “CreateWindowEx”失败,程序打印“无法创建窗口”,或者不打印任何内容,也没有窗口出现? –
@RossRidge CreateWindowEx失败并打印“无法创建窗口”。我会确保澄清这一点。 – Artekis
你忘了调用DefWindowProc。 –