GetInputDesktop - C / C++ / MFC Discussion Boards

Re: Debug assertion failed

David Crow25-Jul-05 6:32

David Crow

25-Jul-05 6:32

At the point in which you are calling GetDlgItem(), no such control having an id of IDC_List1 exists (yet).

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

Re: Debug assertion failed

Bruce Pataki25-Jul-05 7:11

Bruce Pataki

25-Jul-05 7:11

David,

Thank for replying. Let me share some details...

i have created the listview control. I tried to create the listview in the function OnInitialUpdate and it worked successfully.

My need is to keep both windows open like receiver and sender mechanism i.e. Data is passed from one form having edit control and after sending data, display them in listview in separate form. But when i tried to do the same in my defined function (in addition to OnInitialUpdate) i.e. AddData(), I face this problem.

The sequence of code follows. Both Functions exist in the same cpp file.

void CTestView::OnInitialUpdate()
{
CFormView::OnInitialUpdate();
ResizeParentToFit();

m_pSelection = NULL; // initialize selection
CListCtrl* pList = (CListCtrl*) GetDlgItem(IDC_LIST1); // THIS ONE WORKS
pList->InsertColumn(0,"ym",LVCFMT_CENTER,140);
pList->InsertColumn(1,"Ws",LVCFMT_CENTER,70);
pList->InsertColumn(2,"State",LVCFMT_CENTER,50);
}

void CTestView::AddData(LPCTSTR tn,LPCTSTR cn,LPCTSTR ts,LPCTSTR cv)
{
int i=0,j=0;
int flag = 0;

j=rowcount-1;
//pointer to the listview control

CListCtrl* pList = (CListCtrl*) GetDlgItem(IDC_LIST1); // THIS ONE DOES NOT WORK
pList->InsertItem(0,ts);
}

Bruce

Re: Debug assertion failed

David Crow25-Jul-05 7:36

David Crow

25-Jul-05 7:36

Bruce Pataki wrote:
I tried to create the listview in the function OnInitialUpdate...

Why are you creating a list view at runtime rather than deriving the view from CListView? This would allow you access to the underlying list control using GetListCtrl().

If, however, you are using a CFormView with a list control instead, create a CListCtrl member variable instead of using GetDlgItem().

When does AddData() get called?

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

Re: Debug assertion failed

Trollslayer25-Jul-05 7:07

Trollslayer

25-Jul-05 7:07

Control IDs are case sensitive, try IDC_LIST1.

Elaine Rose | [Rose]

The tigress is here Big Grin | :-D

i dont know

Halawlaws25-Jul-05 6:01

Halawlaws

25-Jul-05 6:01

I am using a CProgressCtrl m_PPROG in my main dialog class;
how can i call m_PPROG.SetPos(value) from another function in another class without creating another object of the main class?

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Re: i dont know

David Crow25-Jul-05 6:30

David Crow

25-Jul-05 6:30

Since the progress control is owned by your "main dialog class," good design dictates that only that dialog should interact with the progress control. If some other class needs to interact with the control, it should send/post a message to the owning dialog class, or the owning dialog class should have a public method, that others can call, for setting the control's position.

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

Re: i dont know

Halawlaws25-Jul-05 6:32

Halawlaws

25-Jul-05 6:32

thx

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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

Re: GetInputDesktop

David Crow25-Jul-05 7:45

David Crow

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

Re: GetInputDesktop

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.

Re: GetInputDesktop

David Crow25-Jul-05 7:58

David Crow

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

Re: GetInputDesktop

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

Halawlaws

25-Jul-05 5:22

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

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Re: Window focus

David Crow25-Jul-05 5:31

David Crow

25-Jul-05 5:31

Use GetFocus() for this.

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

Re: Window focus

Halawlaws25-Jul-05 5:33

Halawlaws

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?

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Re: Window focus

toxcct25-Jul-05 5:41

toxcct

25-Jul-05 5:41

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

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

Re: Window focus

Halawlaws25-Jul-05 5:49

Halawlaws

25-Jul-05 5:49

it didnt work

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Re: Window focus

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]

Re: Window focus

Halawlaws25-Jul-05 5:51

Halawlaws

25-Jul-05 5:51

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

forget about Lp.checkcon2() it is always true

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Re: Window focus

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]

Re: Window focus

Halawlaws25-Jul-05 5:56

Halawlaws

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?

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Re: Window focus

Halawlaws25-Jul-05 6:06

Halawlaws

25-Jul-05 6:06

GetDlgItem() is returning NULL
WHY?

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Re: Window focus

David Crow25-Jul-05 6:27

David Crow

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

Re: Window focus

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

Re: Window focus

David Crow25-Jul-05 7:32

David Crow

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

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