📄 tut12.html
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hInstance,NULL</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
mov hwndEdit,eax</font></font></font></b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1></font></font></font>
<p><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>In
WM_CREATE section, we create an edit control. Note that the parameters
that specify x, y, width,height of the control are all zeroes since we
will resize the control later to cover the whole client area of the parent
window.</font></font></font>
<br><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>Note
that in this case, we don't have to call ShowWindow to make the edit control
appear on the screen because we include WS_VISIBLE style. You can use this
trick in the parent window too.</font></font></font><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1></font></font></font>
<p><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>;==============================================</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>;
Initialize the members of OPENFILENAME structure</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>;==============================================</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
mov ofn.lStructSize,SIZEOF ofn</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
push hWnd</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
pop ofn.hWndOwner</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
push hInstance</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
pop ofn.hInstance</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
mov ofn.lpstrFilter, OFFSET FilterString</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
mov ofn.lpstrFile, OFFSET buffer</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
mov ofn.nMaxFile,MAXSIZE</font></font></font></b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1></font></font></font>
<p><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>After
creating the edit control, we take this time to initialize the members
of ofn. Because we want to reuse ofn in the save as dialog box too, we
fill in only the *common* members that're used by both GetOpenFileName
and GetSaveFileName.</font></font></font>
<br><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>WM_CREATE
section is a great place to do once-only initialization.</font></font></font><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1></font></font></font>
<p><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
.ELSEIF uMsg==WM_SIZE</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
mov eax,lParam</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
mov edx,eax</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
shr edx,16</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
and eax,0ffffh</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
invoke MoveWindow,hwndEdit,0,0,eax,edx,TRUE</font></font></font></b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1></font></font></font>
<p><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>We
receive WM_SIZE messages when the size of the client area of our main window
changes. We also receive it when the window is first created. In order
to be able to receive this message, the window class styles must include
CS_VREDRAW and CS_HREDRAW styles. We use this opportunity to resize our
edit control to the same size as the client area of the parent window.
First we have to know the current width and height of the client area of
the parent window. We get this info from lParam. The high word of lParam
contains the height and the low word of lParam the width of the client
area. We then use the information to resize the edit control by calling
MoveWindow function which, in addition to changing the position of the
window, can alter the size too.</font></font></font><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1></font></font></font>
<p><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
.if ax==IDM_OPEN</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
mov ofn.Flags, OFN_FILEMUSTEXIST or \</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
OFN_PATHMUSTEXIST or OFN_LONGNAMES or\</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
OFN_EXPLORER or OFN_HIDEREADONLY</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
invoke GetOpenFileName, ADDR ofn</font></font></font></b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1></font></font></font>
<p><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>When
the user selects File/Open menu item, we fill in the Flags member of ofn
structure and call GetOpenFileName function to display the open file dialog
box.</font></font></font><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1></font></font></font>
<p><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
.if eax==TRUE</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
invoke CreateFile,ADDR buffer,\</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
GENERIC_READ or GENERIC_WRITE ,\</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
FILE_SHARE_READ or FILE_SHARE_WRITE,\</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
NULL,OPEN_EXISTING,FILE_ATTRIBUTE_ARCHIVE,\</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
NULL</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
mov hFile,eax</font></font></font></b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1></font></font></font>
<p><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>After
the user selects a file to open, we call CreateFile to open the file. We
specifies that the function should try to open the file for read and write.
After the file is opened, the function returns the handle to the opened
file which we store in a global variable for future use. This function
has the following syntax:</font></font></font><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1></font></font></font>
<p><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>CreateFile
proto lpFileName:DWORD,\</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
dwDesiredAccess:DWORD,\</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
dwShareMode:DWORD,\</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
lpSecurityAttributes:DWORD,\</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
dwCreationDistribution:DWORD\,</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
dwFlagsAndAttributes:DWORD\,</font></font></font></b>
<br><b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
hTemplateFile:DWORD</font></font></font></b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1></font></font></font>
<p><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1><b>dwDesiredAccess</b>
specifies which operation you want to perform on the file.</font></font></font>
<ul>
<li>
<font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1><b>0 </b>
Open the file to query its attributes. You have to rights to read or write
the data.</font></font></font></li>
<li>
<b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>GENERIC_READ</font></font></font></b><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1>
Open the file for reading.</font></font></font></li>
<li>
<font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1><b>GENERIC_WRITE</b>
Open the file for writing.</font></font></font></li>
</ul>
<font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1><b>dwShareMode</b>
specifies which operation you want to allow other processes to perform
on the file that 's being opened.</font></font></font>
<ul>
<li>
<font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1><b>0</b>
Don't share the file with other processes.</font></font></font></li>
<li>
<font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1><b>FILE_SHARE_READ</b>
allow other processes to read the data from the file being opened</font></font></font></li>
<li>
<font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1><b>FILE_SHARE_WRITE</b>
allow other processes to write data to the file being opened.</font></font></font></li>
</ul>
<font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1><b>lpSecurityAttributes</b>
has no significance under Windows 95.</font></font></font>
<br><font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1><b>dwCreationDistribution</b>
specifies the action CreateFile will perform when the file specified in
lpFileName exists or when it doesn't exist.</font></font></font>
<ul>
<li>
<font face="Arial,Helvetica"><font color="#CCCCCC"><font size=-1><b>CREATE_NEW</b>
Creates a new file. The function fails if the specified file already exists.</font></font></font></li>
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