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<br>
<b> mov wc.lpfnWndProc, OFFSET WndProc</b> <br>
<b> mov wc.cbClsExtra,NULL</b> <br>
<b> mov wc.cbWndExtra,NULL</b> <br>
<b> push hInst</b> <br>
<b> pop wc.hInstance</b> <br>
<b> mov wc.hbrBackground,COLOR_APPWORKSPACE</b>
<br>
<b> mov wc.lpszMenuName,NULL</b> <br>
<b> mov wc.lpszClassName,OFFSET ClassName</b>
<br>
<b> invoke LoadIcon,NULL,IDI_APPLICATION</b> <br>
<b> mov wc.hIcon,eax</b> <br>
<b> mov wc.hIconSm,eax</b> <br>
<b> invoke LoadCursor,NULL,IDC_ARROW</b> <br>
<b> mov wc.hCursor,eax</b> <br>
<b> invoke RegisterClassEx, addr wc</b> <br>
<b> invoke CreateWindowEx,WS_EX_CLIENTEDGE,ADDR ClassName,ADDR
AppName,\</b> <br>
<b>WS_OVERLAPPED+WS_CAPTION+WS_SYSMENU+WS_MINIMIZEBOX+WS_MAXIMIZEBOX+WS_VISIBLE,CW_USEDEFAULT,\</b>
<br>
<b> CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,NULL,NULL,\</b>
<br>
<b> hInst,NULL</b>
<br>
<b> mov hwnd,eax</b> <br>
<b> .while TRUE</b> <br>
<b> invoke GetMessage, ADDR
msg,NULL,0,0</b> <br>
<b> .BREAK .IF (!eax)</b> <br>
<b> invoke TranslateMessage, ADDR
msg</b> <br>
<b> invoke DispatchMessage, ADDR msg</b>
<br>
<b> .endw</b> <br>
<b> mov eax,msg.wParam</b> <br>
<b> ret</b> <br>
<b>WinMain endp</b>
<p><b>WndProc proc hWnd:HWND, uMsg:UINT, wParam:WPARAM, lParam:LPARAM</b> <br>
<b> .if uMsg==WM_CREATE</b> <br>
<b> invoke CreateWindowEx,NULL,ADDR
ProgressClass,NULL,\</b> <br>
<b> WS_CHILD+WS_VISIBLE,100,\</b>
<br>
<b> 200,300,20,hWnd,IDC_PROGRESS,\</b>
<br>
<b> hInstance,NULL</b>
<br>
<b> mov hwndProgress,eax</b> <br>
<b> mov eax,1000
; the lParam of PBM_SETRANGE message contains the range</b> <br>
<b> mov CurrentStep,eax</b> <br>
<b> shl eax,16
; the high range is in the high word</b> <br>
<b> invoke SendMessage,hwndProgress,PBM_SETRANGE,0,eax</b>
<br>
<b> invoke SendMessage,hwndProgress,PBM_SETSTEP,10,0</b>
<br>
<b> invoke CreateStatusWindow,WS_CHILD+WS_VISIBLE,NULL,hWnd,IDC_STATUS</b>
<br>
<b> mov hwndStatus,eax</b> <br>
<b> invoke SetTimer,hWnd,IDC_TIMER,100,NULL
; create a timer</b> <br>
<b> mov TimerID,eax</b> <br>
<b> .elseif uMsg==WM_DESTROY</b> <br>
<b> invoke PostQuitMessage,NULL</b>
<br>
<b> .if TimerID!=0</b> <br>
<b> invoke
KillTimer,hWnd,TimerID</b> <br>
<b> .endif</b> <br>
<b> .elseif uMsg==WM_TIMER
; when a timer event occurs</b> <br>
<b> invoke SendMessage,hwndProgress,PBM_STEPIT,0,0
; step up the progress in the progress bar</b> <br>
<b> sub CurrentStep,10</b> <br>
<b> .if CurrentStep==0</b> <br>
<b> invoke
KillTimer,hWnd,TimerID</b> <br>
<b> mov TimerID,0</b>
<br>
<b> invoke
SendMessage,hwndStatus,SB_SETTEXT,0,addr Message</b> <br>
<b> invoke
MessageBox,hWnd,addr Message,addr AppName,MB_OK+MB_ICONINFORMATION</b> <br>
<b> invoke
SendMessage,hwndStatus,SB_SETTEXT,0,0</b> <br>
<b> invoke
SendMessage,hwndProgress,PBM_SETPOS,0,0</b> <br>
<b> .endif</b> <br>
<b> .else</b> <br>
<b> invoke DefWindowProc,hWnd,uMsg,wParam,lParam</b>
<br>
<b> ret</b> <br>
<b> .endif</b> <br>
<b> xor eax,eax</b> <br>
<b> ret</b> <br>
<b>WndProc endp</b> <br>
<b>end start</b>
<h4> <b>Analysis:</b></h4>
<ul>
<b> invoke WinMain, hInstance,NULL,NULL, SW_SHOWDEFAULT</b>
<br>
<b> invoke ExitProcess,eax</b> <br>
<b> invoke InitCommonControls</b>
</ul>
I deliberately put InitCommonControls after ExitProcess to demonstrate that InitCommonControls
is just there for putting a reference to comctl32.dll in the import section. As
you can see, the common controls work even if InitCommonControls doesn't execute.
<ul>
<b> .if uMsg==WM_CREATE</b> <br>
<b> invoke CreateWindowEx,NULL,ADDR
ProgressClass,NULL,\</b> <br>
<b> WS_CHILD+WS_VISIBLE,100,\</b>
<br>
<b> 200,300,20,hWnd,IDC_PROGRESS,\</b>
<br>
<b> hInstance,NULL</b>
<br>
<b> mov hwndProgress,eax</b>
</ul>
Here is where we create the common control. Note that this CreateWindowEx call
contains hWnd as the parent window handle. It also specifies a control ID for
identifying this control. However, since we have the control's window handle,
this ID is not used. All child window controls must have WS_CHILD style.
<ul>
<b> mov eax,1000</b> <br>
<b> mov CurrentStep,eax</b> <br>
<b> shl eax,16</b> <br>
<b> invoke SendMessage,hwndProgress,PBM_SETRANGE,0,eax</b>
<br>
<b> invoke SendMessage,hwndProgress,PBM_SETSTEP,10,0</b>
</ul>
After the progress bar is created, we can set its range. The default range is
from 0 to 100. If you are not satisfied with it, you can specify your own range
with PBM_SETRANGE message. lParam of this message contains the range, the maximum
range is in the high word and the minimum one is in the low word. You can specify
how much a step takes by using PBM_SETSTEP message. The example sets it to 10
which means that when you send a PBM_STEPIT message to the progress bar, the progress
indicator will rise by 10. You can also set your own indicator level by sending
PBM_SETPOS messages. This message gives you tighter control over the progress
bar.
<ul>
<b> invoke CreateStatusWindow,WS_CHILD+WS_VISIBLE,NULL,hWnd,IDC_STATUS</b>
<br>
<b> mov hwndStatus,eax</b> <br>
<b> invoke SetTimer,hWnd,IDC_TIMER,100,NULL
; create a timer</b> <br>
<b> mov TimerID,eax</b>
</ul>
Next, we create a status bar by calling CreateStatusWindow. This call is easy
to understand so I'll not comment on it. After the status window is created, we
create a timer. In this example, we will update the progress bar at a regular
interval of 100 ms so we must create a timer control. Below is the function prototype
of SetTimer.
<ul>
<b>SetTimer PROTO hWnd:DWORD, TimerID:DWORD, TimeInterval:DWORD, lpTimerProc:DWORD</b>
</ul>
<b>hWnd</b> : Parent window handle <br>
<b>TimerID</b> : a nonzero timer identifier. You can create your own identifier.
<br>
<b>TimerInterval</b> : the timer interval in milliseconds that must pass before
the timer calls the timer procedure or sends a WM_TIMER message <br>
<b>lpTimerProc</b> : the address of the timer function that will be called when
the time interval expires. If this parameter is NULL, the timer will send WM_TIMER
message to the parent window instead.
<p>If this call is successful, it will return the TimerID. If it failed, it returns
0. This is why the timer identifer must be a nonzero value.
<ul>
<b> .elseif uMsg==WM_TIMER</b> <br>
<b> invoke SendMessage,hwndProgress,PBM_STEPIT,0,0</b>
<br>
<b> sub CurrentStep,10</b> <br>
<b> .if CurrentStep==0</b> <br>
<b> invoke
KillTimer,hWnd,TimerID</b> <br>
<b> mov TimerID,0</b>
<br>
<b> invoke
SendMessage,hwndStatus,SB_SETTEXT,0,addr Message</b> <br>
<b> invoke
MessageBox,hWnd,addr Message,addr AppName,MB_OK+MB_ICONINFORMATION</b> <br>
<b> invoke
SendMessage,hwndStatus,SB_SETTEXT,0,0</b> <br>
<b> invoke
SendMessage,hwndProgress,PBM_SETPOS,0,0</b> <br>
<b> .endif</b>
</ul>
When the specified time interval expires, the timer sends a WM_TIMER message.
You will put your code that will be executed here. In this example, we update
the progress bar and then check if the maximum limit has been reached. If it has,
we kill the timer and then set the text in the status window with SB_SETTEXT message.
A message box is displayed and when the user clicks OK, we clear the text in the
status bar and the progress bar.
<hr size="1">
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