eax invoke RegisterClassEx, addr wc

.data
ClassName db "SimpleWinClass",0 AppName db "Our First Window",0 MouseClick db 0 ; 0=no click yet
.data? hInstance HINSTANCE ? CommandLine LPSTR ?
hitpoint POINT <>
.code
start: invoke GetModuleHandle, NULL mov hInstance,eax invoke GetCommandLine
mov CommandLine,eax invoke WinMain, hInstance,NULL,CommandLine, SW_SHOWDEFAULT invoke ExitProcess,eax
WinMain proc hInst:HINSTANCE,hPrevInst:HINSTANCE,CmdLine:LPSTR,CmdShow:DWORD LOCAL wc:WNDCLASSEX
LOCAL msg:MSG LOCAL hwnd:HWND mov wc.cbSize,SIZEOF WNDCLASSEX mov wc.style, CS_HREDRAW or CS_VREDRAW
mov wc.lpfnWndProc, OFFSET WndProc mov wc.cbClsExtra,NULL mov wc.cbWndExtra,NULL push hInst
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 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,SW_SHOWNORMAL
invoke UpdateWindow, hwnd .WHILE TRUE invoke GetMessage, ADDR msg,NULL,0,0 .BREAK .IF (!eax)
invoke DispatchMessage, ADDR msg .ENDW mov eax,msg.wParam ret
WinMain endp
WndProc proc hWnd:HWND, uMsg:UINT, wParam:WPARAM, lParam:LPARAM
LOCAL hdc:HDC
LOCAL ps:PAINTSTRUCT
.IF uMsg==WM_DESTROY invoke PostQuitMessage,NULL .ELSEIF uMsg==WM_LBUTTONDOWN mov eax,lParam
and eax,0FFFFh mov hitpoint.x,eax mov eax,lParam shr eax,16
mov hitpoint.y,eax mov MouseClick,TRUE invoke InvalidateRect,hWnd,NULL,TRUE .ELSEIF uMsg==WM_PAINT
invoke BeginPaint,hWnd, ADDR ps mov hdc,eax .IF MouseClick invoke lstrlen,ADDR AppName
invoke TextOut,hdc,hitpoint.x,hitpoint.y,ADDR AppName,eax .ENDIF invoke EndPaint,hWnd, ADDR ps .ELSE
invoke DefWindowProc,hWnd,uMsg,wParam,lParam ret .ENDIF xor eax,eax
ret WndProc endp end start
Анализ:
.ELSEIF uMsg==WM_LBUTTONDOWN

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