C / C++ / MFC

25-Jul-05 6:32

thx

/\|-||\/|/\|)

GetInputDesktop

sarah carlson25-Jul-05 5:42

sarah carlson

25-Jul-05 5:42

I am trying to figure out if the current desktop is the desktop that my interactive service is running on, and I came across the GetInputDesktop function exported by user32.dll. It appears to always return 0 if either the login screen or screen saver or a fast user switching terminal services desktop is active. So, I simply compare the returned HDESK value of that to the value returned by GetThreadDesktop and I have my answer. But since GetInputDesktop is undocumented, I'm wondering if there is another way to get at this information, or if anyone knows anything more specific about the GetInputDesktop function.

Thanks much.

sarah

David Crow25-Jul-05 7:45

25-Jul-05 7:45

sarah carlson wrote:
But since GetInputDesktop is undocumented...

How much do you require before something is considered documented?

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/getthreaddesktop.asp[^]

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

sarah carlson25-Jul-05 7:54

sarah carlson

25-Jul-05 7:54

Yes, GetThreadDesktop is documented. However, GetInputDesktop is not. That is the function I'm curious about.

David Crow25-Jul-05 7:58

25-Jul-05 7:58

My bad.

Thread and Input just look so much alike!

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Jose Lamas Rios25-Jul-05 16:15

Jose Lamas Rios

25-Jul-05 16:15

Never worked with this, but there's a documented OpenInputDesktop(), which (quote) "retrieves a handle to the desktop that receives user input. The input desktop is a desktop on the window station associated with the logged-on user."

Would that be of help?

--
jlr
http://jlamas.blogspot.com/[^]

Window focus

Halawlaws25-Jul-05 5:22

25-Jul-05 5:22

Wat function do i call to get a bool parameter indicating that my window has the focus or not?

/\|-||\/|/\|)

David Crow25-Jul-05 5:31

25-Jul-05 5:31

Use GetFocus() for this.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Halawlaws25-Jul-05 5:33

25-Jul-05 5:33

GetFocus returns a handle of the window but how can i know that this is the window i want or not?

/\|-||\/|/\|)

toxcct25-Jul-05 5:41

toxcct

25-Jul-05 5:41

if (GetFocus() == GetDlgItem(IDC_MY_WINDOW)) {
    //...
}

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Halawlaws25-Jul-05 5:49

25-Jul-05 5:49

it didnt work

/\|-||\/|/\|)

toxcct25-Jul-05 5:50

toxcct

25-Jul-05 5:50

because you don't use it properly...

post your code

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Halawlaws25-Jul-05 5:51

25-Jul-05 5:51

if (Lp.checkcon2() && (GetFocus() == GetDlgItem(IDD_AUTOMATIC)))

forget about Lp.checkcon2() it is always true

/\|-||\/|/\|)

toxcct25-Jul-05 5:54

toxcct

25-Jul-05 5:54

hum, what about GetFocus() == m_hWnd ??
moreover, are you sure that GetDlgItem() doesn't return NULL ?!

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Halawlaws25-Jul-05 5:56

25-Jul-05 5:56

i received this error message

error C2446: '==' : no conversion from 'struct HWND__ *' to 'class CWnd *'
Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
error C2230: '==' : indirection to different types
Error executing cl.exe.

maybe it doesnt work when this is not the main dialog?

/\|-||\/|/\|)

Halawlaws25-Jul-05 6:06

25-Jul-05 6:06

GetDlgItem() is returning NULL
WHY?

/\|-||\/|/\|)

David Crow25-Jul-05 6:27

25-Jul-05 6:27

Halawlaws wrote:
WHY?

Because no such control having an id IDD_AUTOMATIC exists at the point in which GetDlgItem() is being called.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Trollslayer25-Jul-05 7:11

Trollslayer

25-Jul-05 7:11

I have to say David, I'm surprised at your patience !

Elaine Rose | [Rose]

The tigress is here Big Grin | :-D

David Crow25-Jul-05 7:32

25-Jul-05 7:32

Why would that surprise you?

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

David Crow25-Jul-05 6:26

25-Jul-05 6:26

Halawlaws wrote:
if (Lp.checkcon2() && (GetFocus() == GetDlgItem(IDD_AUTOMATIC)))

I've yet to figure out why people do this and then complain that it does not work.

To figure out exactly which part of the above statement is not working, break it up into manageable pieces, like:

// set a breakpoint on this line and single-step through each statement.
// note the value of pWnd1 and pWnd2 along the way
CWnd *pWnd1 = GetFocus();
if (pWnd1 != NULL)
{
    CWnd *pWnd2 = GetDlgItem(IDD_AUTOMATIC);
    if (pWnd2 != NULL)
    {
        if (pWnd1 == pWnd2)
            ...
    }
}

At this point, you should know the return value of GetFocus() and GetDlgItem() and whether they are equal or not.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

David Crow25-Jul-05 5:45

25-Jul-05 5:45

Halawlaws wrote:
...but how can i know that this is the window i want or not?

Because you already have a handle to that window. Just compare the two.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Halawlaws25-Jul-05 5:50

25-Jul-05 5:50

what is it?

/\|-||\/|/\|)