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In the Win32 API (or atleast I think it's in the Win32 API), the AsyncKeyState function can be used to see if a keyboard button is pressed.
Does anyone know the code for the buttons on the keyboard? I arleady know that the arrow keys are VK_UP, VK_DOWN, VK_LEFT, and VK_RIGHT, and the "Enter" button is VK_RETURN.
Thanks!
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I see. But what about the letter keys. All the list says is, for example: (48) H Key; (4D) M Key
How would you use that in code when trying to do something like this:
if (GetAsyncKeyState(VK_LEFT) < 0)
{
//result of key press here
}
Instead of using VK_LEFT, how would I use the letter "M" or the letter "H"?
Thanks again!
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(48) H is an example of the value of the constant. All the VK_* are is constants defined for a particular value.
I suppose Microsoft didn't think it was necessary to define VK constants for printable ASCII characters, especially since the values are the same as the ASCII character code. So, the key constant for "A" is 0x41 (65), as well as the ASCII value. This makes it easy to translate key codes to printable ASCII characters.
This posting is provided "AS IS" with no warranties, and confers no rights.
Software Design Engineer
Developer Division Sustained Engineering
Microsoft
[My Articles] [My Blog]
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I have a problem with the combination of ModifyStyle and DoModal:
ModifyStyle(0, WS_MINIMIZE, SWP_HIDEWINDOW);<br />
dlg_whatever.DoModal();
(only these both together pose the problem)
at this point. i.e. after the subdialog ended with EndDialog, the keyboard's ALT status is "toggled", even though the keyboard has not been touched all the time.
This poses a problem for me, so I carry out a SetKeyboardState, clearing the ALT status (testwise clearing the status of ALL keys too). This works so far, that a subsequent GetKeyboardState showsn that the ALT key is not toggled any more.
However, when any key gets pressed now, PreTranslateMessage shows WM_SYSKEYUP (i.e. ALT status).
Does anyone know
1. the reason for this behaviour,
2. how to clear the ALT state more effectively than by SetKeyboardState?
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I have trouble believing that ModifyStyle() will alter the Keyboard state. What makes you believe the Alt key status has been toggled?
Neville Franks, Author of ED for Windows www.getsoft.com and Surfulater www.surfulater.com "Save what you Surf"
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As I posted, not ModifyStyle, nor DoModal, but these two in combination achieve that.
In the meantime I found out, what's happening. I have to note, that I have noticed and tested this issue only in XP.
Every time, when no control has the focus in the dialog, ALT mode will be entered - and that is happening after ModifyStyle, DoModal.
I inserted a SetFocus() after DoModal, and the problem is cleared. Then I tested around, and found, that in other cases, when no control is focused on (for example, when the currently focused control becomed disabled), ALT mode will be entered.
The ALT status was easy to notice, because a PreTranslateMessage handler processes certain Alt-key combinations, like AltReturn, AltRight, etc., and these functions showed up without having touched the Alt key before.
Thanks anyway.
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Vancouver wrote:
Every time, when no control has the focus in the dialog, ALT mode will be entered - and that is happening after ModifyStyle, DoModal.
I think you will find that if no control has focus the Dialogs System Menu will get focus, which will then process keys as SystemKeys (ALT style).
The first control with a Tab Stop style will automatically get focus so shouldn't normally need to use SetFocus().
Neville Franks, Author of ED for Windows www.getsoft.com and Surfulater www.surfulater.com "Save what you Surf"
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1. I DID find, that PreTranslateMessage received the ALT key combinations in this situation (where the ALT has been simulated).
Btw, this is a dialog-based application, there is no system menu. I realize I should have written that in the first post.
2. The first non-disabled tab-stop button DOES receive the focus automatically, but not always.
One case is after the ModifyStyle + DoModal, another case was when the focus was on a CEdit control, which became disabled and the focus has not been assigned.
As soon as the focus will be assigned explicitely when disabling the control, the problem is gone.
Now I am assigning the focus to the dialog, i.e. with "this", which then gives the focus automatically to the first control in the TAB sequence.
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I have a small problem with bolding text using RichEditView. I have tried using this code:
CRichEditCtrl &RichCtrl = GetRichEditCtrl();
CHARFORMAT cf;
cf.dwEffects = CFE_BOLD;
cf.dwMask = CFM_BOLD;
RichCtrl.SetSelectionCharFormat(cf);
I have used the same code for underline, italic, strikeout and link (changing the attributes to match the type) and the code works for them.
Any ideas?
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Egg on face. I forgot to change the Font. Code works fine. Where's my sign?
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Hi,
i am trying to get a CWnd derived class having a vertical scrollbar by PreSubclassWindow.
void CWndDerivedClass::PreSubclassWindow()<br />
{<br />
ModifyStyle( 0L, WS_VSCROLL );<br />
CWnd::PreSubclassWindow();<br />
}
It's not working, all i can see is a vertical scrollbar but i can't use it. 
Spy++ing: There are only WM_NCHITTEST messages with return value HTTRANSPARENT (no HTVSCROLL).
If i CreateEx the class:
<br />
m_cWndDerivedClass.CreateEx( 0L, NULL, NULL, WS_CHILD|WS_VISIBLE|WS_VSCROLL, rcRect, this, 1002 );<br />
then i have a valid and full functional vertical scrollbar!
Does anybody know how to solve this problem?
I don't want to CreateEx the derived class, or do i have to?
thx a lot
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Friends,
I want to enumerate files present in certain folder. I may also want to enumerate files present in a subfolder withing a folder.
What are the possible methods to do so ?? I would prefer some non MFC solution.
Imtiaz
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Combination of these api will help
- FindFirstFile
- FindNextFile
- FindClose
"I Think this Will Help"
Alok Gupta
visit me at http://www.thisisalok.tk
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HANDLE find;
WIN32_FIND_DATA wfd;
find = FindFirstFile( "path/to/your/folder/*.*", &wfd );
if( INVALID_HANDLE_VALUE != find )
{
do
{
// wfd will contain the data of the current file
}
while( FindNextFile( find, &wfd ) );
FindClose( find );
}
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You must call FindNextFile() before you use the values in the WIN32_FIND_DATA structure:
HANDLE find;
WIN32_FIND_DATA wfd;
find = FindFirstFile( "path\\to\\your\\folder\\*.*", &wfd );
if( INVALID_HANDLE_VALUE != find )
{
while( FindNextFile( find, &wfd ) )
{
}
FindClose( find );
}P.S. The convention on Code Project is to enclose blocks of code in <pre>...</pre> tags.
Software Zen: delete this;
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Gary R. Wheeler wrote:
You must call FindNextFile() before you use the values in the WIN32_FIND_DATA structure:
are you sure?
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This is all i have to say.
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/base/findfirstfile.asp
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/base/findnextfile.asp
make sure you read the description of the second paramter on FindFirstFile and the remarks 
P.S. I don't give a rats ***
Hey! Look at this nice litte example which happens to use the data in the WIN32_FIND_DATA structure before FindNextFile is called
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/base/listing_the_files_in_a_directory.asp
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Oops. It looks like you're right  .
Although, it doesn't really make a difference, in this specific case, since FindFirstFile() for *.* will return the current directory (named ".").
Software Zen: delete this;
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Hi all:
I have a titleless dialog(for some reason), which has a constructor like
MyDlg(CWnd* pParent = NULL);
But somehow I want to add a button to this dialog which have the standardize minimize funtion.
here is the customized minimize funtion's implementation
<br />
void MyDlg::OnBtnMinimize()<br />
{<br />
ShowWindow(SW_MINIMIZE);<br />
}<br />
But after I clicked the minimized button it just disappears. Later I found it(just part of this dialog) positioned at somewhere in the lower left corner of the desktop and just above the system taskbar. It obviously not positioned at the system taskbar.
How can I get the standard minimize function without the title bar? Do I have to pass the return value from GetDesktopWindow to Mydialog dialog, I tried It didn't work!
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Thanks for your WS_EX_APPWINDOW answer, it works.But if you don't mind I wanna ask you few more questions which related to this one.
When I clicked the minimize button, this dialog does positioned at the sys taskbar. But what makes it not so good is it doesn't have caption when It appears in the sys taskbar. I've tried to add CAPTION "" to the script and it worked but it at the expense of just the part of dialog appears not as whole.How can I get a caption at the taskbar(still does't have caption bar) when It minimized or maximized?
Furthermore, When I click the dialog at the sys taskbar consecutively, It seems not responding well, it only get minimized. Which should be get maximized and minimized correspondingly.
Thanks fot your time and patience!
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I have been trying to debug my Add-In for Visual Studio .NET 2003 on Windows XP SP2. I seem to be always getting an error message with the error code 800a0030. I have tried using Error Lookup but even that can't tell me what the code means, it just says error message not found. I have also looked through all the files that come with VS .NET 2003 to see if I can find it there but no luck.
Does anybody know?
I am the handsome one in the crowd.
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