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Here are some code about DeviceIoControl:
BTemp=DeviceIoControl
(
hDrive, // handle to device
IOCTL_STORAGE_CHECK_VERIFY, // dwIoControlCode operation
NULL, // lpInBuffer; must be NULL
0, // nInBufferSize; must be zero
NULL, // lpOutBuffer; must be NULL
0, // nOutBufferSize; must be zero
&BytesReturned, // number of bytes returned
NULL // OVERLAPPED structure
);
this function "DeviceIoControl" is to check whether the floppy disk has been changed(If the function succeeds, the return value is nonzero.If the function fails, the return value is zero.)
Something wrong happens here:
BTemp is a minus when I test on a wrong floppy device which does not work well while it is plus when on a work-well floppy device
does this mean that a returned minus value says the floppy device is error?
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 Hi All,
I have a webbrowser object and I want to open the new window link in same parent window and not let the child window to open. I searched for new window method and found it as..OnNewWindow2(LPDISPATCH FAR* ppDisp, BOOL* Cancel)..where assigning cancel to to non zero value does the job of letting open the IE in new window..but I dont know how to get it to navigate to the link user has clicked on...I found an example in VB but that takes in the parameter as URL and in VC..i wasnt able to find any such method..I need it to be done..can anyone out there help me out..any help or pointers are highly appreciated..Thanks a lot in advance..
Himanshu
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When I add information to access table ,I use this code !
set.m_access_attribute = GetDlgItemInt (IDC_EDIT1);
How can I warn to fill edit box if it is forgotten ?
emroz
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GetDlgItemInt has two more parameters. The actual syntax is: UINT GetDlgItemInt( int nID, BOOL* lpTrans = NULL, BOOL bSigned = TRUE ) const;
If the edit box doesn't contain a valid numeric value then pTrans would become 0.
BOOL pTrans;
int iValue = GetDlgItemInt( IDC_EDIT1, &pTrans );
if( pTrans == 0 )
AfxMessageBox( "Please enter a numerical value!");
else
set.m_access_attribute = iValue;
I haven't tried to compile the code so it might contain errors.
Another way is to force the edit box accept only integers and that can be done in the resource editor. Right-click on the edit box, select properties, and then in the styles tab select Number.
// Afterall, I realized that even my comment lines have bugs
When one cannot invent, one must at least improve (in bed).-My latest fortune cookie
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how is it done when using a dialog with a toolbar?
thanks
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If your program is dialog based, then how did you attach a toolbar to it?
Anyways, since you didn't accept the answer from Eugene (sorry if I misspelled the name), then you can try something like this (only if the toolbar is dialog based):
GetDlgItem( IDC_TOOLBAR_ITEM )->EnableWindow( TRUE );
// Afterall, I realized that even my comment lines have bugs
When one cannot invent, one must at least improve (in bed).-My latest fortune cookie
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i didnt accept Eugenes answer becuase i couldnt figure out how to get the commandui function
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also your answer doesnt work 
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In Visual C++ 6.0, when I set Directory list in menu "Tools->Options...->Directories", the Directory list is used for every project. If I open new project, I must enter new Directory list. How can I set the Directory list for each project? I'm boring to set new Directory list every time I open new project.
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Hi,
use your project-settings.
For include files: project-settings -> C/C++ -> Preprocessor : "Additional include directories"
For Lib files: project-settings -> Link -> Input : "Additional library path"
HTH
Regards
Frank
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I want to control 'richedit sting color'.
Fisrt step,,,,
I used CRicheditCtrl member,,,,
I accessed directly RTF-formated string.
and,select string,and set RTF-formated string.
because of selecting string,the program affect scroll bar and cursor.
ofcourse,I can used CRichEditCtrl::SetSel.But For a moment, the selection range flickers.
Second Step,,,
I used ITextRange member,,,,
But A program needs to convert "CString(char*)-index" to "CRichEditCtrl(GetSel)-index", in order to use a member.
How do I convert "CRichEditCtrl::GetSel index" to "CString(char*) index"?
or
How do I convert "CString(char*) index" to "CRichEditCtrl::GetSel index"?
Please help me.
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table = "account"<br />
<br />
---------------------<br />
ID Pass <br />
---------------------<br />
"user1" "abc"<br />
"user2" "xyz"<br />
"user3" "y3z"<br />
<br />
<br />
.......<br />
DDX_Control(pDX, IDC_EDIT1, m_ID);<br />
......<br />
<br />
void login::OnOk() <br />
{<br />
CString strID;<br />
m_ID.GetWindowText(strID);<br />
m_pSet->m_strFilter = "ID = " + strID; <br />
AfxMessageBox(m_pSet->m_Pass);<br />
}
when I typed "user2" or "user3" into edit control (IDC_EDIT1) , these code always show Messagebox with "abc" :eek  ( 
how can I do to achieve correct password "xyz" when typed "user2"  ?
thanks
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That filter would probably work if you enclose strID in single quotation marks (apostrophes).
// Might not compile as is (see CString operator +)
m_pSet->m_strFilter = "ID = '" + strID + "'";
// Afterall, I realized that even my comment lines have bugs
When one cannot invent, one must at least improve (in bed).-My latest fortune cookie
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thank......... but
I also tried this way, I still get wrong result
help me , please
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I program with ADO (that's how a filter would work in ADO), but in ODBC you cannot set a filter after the database is opened. (At least this is what MSDN says  )
"After you construct the recordset object, but before you call its Open member function, use this data member to store a CString containing an SQL WHERE clause."
// Afterall, I realized that even my comment lines have bugs
When one cannot invent, one must at least improve (in bed).-My latest fortune cookie
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How do i disable and enable toolbar buttons within code
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Use the UPDATE_COMMAND_UI for needed buttons.
void CMainFrame::OnUpdate....(CCmdUI* pCmdUI)
{
pCmdUI->Enable(FALSE);
}
Best regards,
Eugene Pustovoyt
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how would that get called? ive never used cmdui and my program is dialog based
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I have a program that resizes all my controls including the status bar but it doesnt resize the panes inside is there a way to do this?
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Hi,
see the following code
<br />
m_wndStatusBar.GetPaneInfo(1, ID, Style, width);<br />
Style = SBPS_NORMAL;<br />
width = 500;<br />
m_wndStatusBar.SetPaneInfo(1, 0, Style, width);<br />
In this example you get the style and width of the second pane, change the attributes and set the new attributes.
If you use the index, you don't need the ID.
Regards
Frank
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yeah i treid that it actualy cuases the program to crash
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crash? .. ok
now we need some more information:
- which function crashes and possible at which position internally
- the exception message
- if possible the error code (e.g. DWORD GetLastError() ), maybe use a try-catch(...)-block.
Regards
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I'm trying to work with the mciSendString, but it's new to me. I've not seen it mentioned in any of the books I have. What's it used for?
Tanks!!!!!
Dave
"The man who reads nothing is better educated than the man who reads nothing but newspapers."- Thomas Jefferson
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Platform SDK: Windows Multimedia
MCI
The Media Control Interface (MCI) provides standard commands for playing multimedia devices and recording multimedia resource files. These commands are a generic interface to nearly every kind of multimedia device.
The mciSendString function sends a command string to an MCI device. The device that the command is sent to is specified in the command string.
Example in Platform SDK Doc:
DWORD PlayFromTo(LPSTR lpstrAlias, DWORD dwFrom, DWORD dwTo)
{
char achCommandBuff[128];
wsprintf(achCommandBuff, "play %s from %u to %u",
lpstrAlias, dwFrom, dwTo);
return mciSendString(achCommandBuff, NULL, 0, NULL);
}
BuggyMax
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Thanks Max
"The man who reads nothing is better educated than the man who reads nothing but newspapers."- Thomas Jefferson
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