在.data?段添加

bufferw db 50 dup(?)
   buffers db 50 dup(?)

在WM_CREATE消息处理段添加，

invoke GetWindowsDirectory, addr bufferw, sizeof bufferw ; 置Windows目录于缓冲区中
invoke GetSystemDirectory, addr buffers, sizeof buffers ;置系统目录于缓冲区中

在WM_PAINT消息处理段添加，

invoke DrawText,@hDc,addr bufferw,-1,\
addr @stRect,\
DT_SINGLELINE or DT_VCENTER or DT_LEFT

invoke DrawText,@hDc,addr buffers,-1,\
addr @stRect,\
DT_SINGLELINE or DT_VCENTER or DT_RIGHT

添加一个画圆过程circle，代码见后；

在WM_PAINT消息处理段添加，

invoke  circle,hWnd,00E5C27Fh,10,10,50,50

效果；

代码：

windemo1.asm

.586
.model flat,stdcall
option casemap:noneinclude windows.incinclude user32.incinclude kernel32.incinclude gdi32.incincludelib user32.libincludelib kernel32.libincludelib gdi32.libWinMain proto :DWORD,:DWORD,:DWORD,:DWORD.dataClassName db "MainWinClass",0AppName  db "Main Window",0szText       db  '小狗狗，小兔兔，小猫猫 !',0hCap db "WindowsDirectory",0.data?hInstance HINSTANCE ?CommandLine LPSTR ?bufferw db 50 dup(?)buffers db 50 dup(?).code; ---------------------------------------------------------------------------circle proc hndl:DWORD,colr:DWORD,tx:DWORD,ty:DWORD,lx:DWORD,ly:DWORDLOCAL hDC     :DWORDLOCAL hPen    :DWORDLOCAL hPenOld :DWORDinvoke GetDC,hndlmov hDC, eaxinvoke CreatePen,0,3,colrmov hPen, eaxinvoke SelectObject,hDC,hPenmov hPenOld, eaxinvoke Arc,hDC,tx,ty,lx,ly,0,0,0,0invoke SelectObject,hDC,hPenOldinvoke DeleteObject,hPenretcircle endpstart:invoke GetModuleHandle, NULLmov    hInstance,eaxinvoke GetCommandLinemov    CommandLine,eaxinvoke WinMain, hInstance,NULL,CommandLine, SW_SHOWDEFAULTinvoke ExitProcess,eaxWinMain proc hInst:HINSTANCE,hPrevInst:HINSTANCE,CmdLine:LPSTR,CmdShow:DWORDLOCAL wc:WNDCLASSEXLOCAL msg:MSGLOCAL hwnd:HWNDmov   wc.cbSize,SIZEOF WNDCLASSEXmov   wc.style, CS_HREDRAW or CS_VREDRAWmov   wc.lpfnWndProc, OFFSET WndProcmov   wc.cbClsExtra,NULLmov   wc.cbWndExtra,NULLpush  hInstancepop   wc.hInstancemov   wc.hbrBackground,COLOR_BTNFACE+1mov   wc.lpszMenuName,NULLmov   wc.lpszClassName,OFFSET ClassNameinvoke LoadIcon,NULL,IDI_APPLICATIONmov   wc.hIcon,eaxmov   wc.hIconSm,eaxinvoke LoadCursor,NULL,IDC_ARROWmov   wc.hCursor,eaxinvoke RegisterClassEx, addr wcINVOKE CreateWindowEx,NULL,ADDR ClassName,ADDR AppName,\WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,\CW_USEDEFAULT,300,200,NULL,NULL,\hInst,NULLmov   hwnd,eaxinvoke ShowWindow, hwnd,SW_SHOWNORMALinvoke UpdateWindow, hwnd.WHILE TRUEinvoke GetMessage, ADDR msg,NULL,0,0.BREAK .IF (!eax)invoke TranslateMessage, ADDR msginvoke DispatchMessage, ADDR msg.ENDWmov     eax,msg.wParamret
WinMain endpWndProc proc hWnd:HWND, uMsg:UINT, wParam:WPARAM, lParam:LPARAMlocal    @stPs:PAINTSTRUCTlocal @stRect:RECTlocal  @hDc.IF uMsg==WM_DESTROYinvoke PostQuitMessage,NULL.ELSEIF uMsg==WM_CREATEinvoke GetWindowsDirectory, addr bufferw, sizeof bufferw ; 置Windows目录于缓冲区中invoke GetSystemDirectory, addr buffers, sizeof buffers ;置系统目录于缓冲区中.ELSEIF uMsg ==   WM_PAINTinvoke  BeginPaint,hWnd,addr @stPsmov  @hDc,eaxinvoke GetClientRect,hWnd,addr @stRectinvoke  DrawText,@hDc,addr szText,-1,\addr @stRect,\DT_SINGLELINE or DT_CENTER or DT_VCENTERinvoke    DrawText,@hDc,addr bufferw,-1,\addr @stRect,\DT_SINGLELINE or DT_VCENTER or DT_LEFTinvoke DrawText,@hDc,addr buffers,-1,\addr @stRect,\DT_SINGLELINE or DT_VCENTER or DT_RIGHTinvoke  circle,hWnd,00E5C27Fh,10,10,50,50invoke   EndPaint,hWnd,addr @stPs.ELSEinvoke DefWindowProc,hWnd,uMsg,wParam,lParam      ret.ENDIFxor eax,eaxret
WndProc endpend start