Windows - Get HWND from TreeView for GetScrollInfo?
I'm new to Windows programming and trying to get the position of a TreeView's scroll bar.
SCROLLINFO scrollInfo;
ZeroMemory(&scrollInfo, sizeof(scrollInfo));
scrollInfo.cbSize = sizeof(scrollInfo);
scrollInfo.fMask = SIF_TRACKPOS;
tbool gotScrollInfo = GetScrollInfo(poTreeView->Handle, SB_VERT, &scrollInfo);
I get an error:
'BOOL GetScrollInfo(HWND,int,LPSCROLLINFO)': cannot convert argument 1 from 'System::IntPtr' to 'HWND'.
I've looked online and cannot find how to get from the TreeView pointer to an HWND. Windows' documentation assumes you already have the HWND.
I've seen other places where people use TreeView.hwnd or cast TreeView.Handle to an IntPtr - I guess the function used to take that instead of an HWND?
Does anyone know how to do this? this should be super simple, but I can't find the answer.
.net winapi treeview hwnd
edited Nov 21 '18 at 1:54
Barmak Shemirani
21.6k42448
asked Nov 15 '18 at 16:14
Bob SBob S
4017
add a comment |
I'm new to Windows programming and trying to get the position of a TreeView's scroll bar.
SCROLLINFO scrollInfo;
ZeroMemory(&scrollInfo, sizeof(scrollInfo));
scrollInfo.cbSize = sizeof(scrollInfo);
scrollInfo.fMask = SIF_TRACKPOS;
tbool gotScrollInfo = GetScrollInfo(poTreeView->Handle, SB_VERT, &scrollInfo);
I get an error:
'BOOL GetScrollInfo(HWND,int,LPSCROLLINFO)': cannot convert argument 1 from 'System::IntPtr' to 'HWND'.
I've looked online and cannot find how to get from the TreeView pointer to an HWND. Windows' documentation assumes you already have the HWND.
I've seen other places where people use TreeView.hwnd or cast TreeView.Handle to an IntPtr - I guess the function used to take that instead of an HWND?
Does anyone know how to do this? this should be super simple, but I can't find the answer.
.net winapi treeview hwnd
edited Nov 21 '18 at 1:54
Barmak Shemirani
21.6k42448
asked Nov 15 '18 at 16:14
Bob SBob S
4017
1
What language is that? Post your pinvoke call that you are using for GetScrollInfo. Generally, yes, treeView1.Handle is the HWND you are looking for.
– LarsTech
Nov 15 '18 at 23:16
The.nettag is useless. What language are you writing your code in? Managed or unmanaged? Where's your declaration forGetScrollInfo()?
– Ken White
Nov 15 '18 at 23:20
add a comment |
I'm new to Windows programming and trying to get the position of a TreeView's scroll bar.
SCROLLINFO scrollInfo;
ZeroMemory(&scrollInfo, sizeof(scrollInfo));
scrollInfo.cbSize = sizeof(scrollInfo);
scrollInfo.fMask = SIF_TRACKPOS;
tbool gotScrollInfo = GetScrollInfo(poTreeView->Handle, SB_VERT, &scrollInfo);
I get an error:
'BOOL GetScrollInfo(HWND,int,LPSCROLLINFO)': cannot convert argument 1 from 'System::IntPtr' to 'HWND'.
I've looked online and cannot find how to get from the TreeView pointer to an HWND. Windows' documentation assumes you already have the HWND.
I've seen other places where people use TreeView.hwnd or cast TreeView.Handle to an IntPtr - I guess the function used to take that instead of an HWND?
Does anyone know how to do this? this should be super simple, but I can't find the answer.
.net winapi treeview hwnd
edited Nov 21 '18 at 1:54
Barmak Shemirani
21.6k42448
asked Nov 15 '18 at 16:14
Bob SBob S
4017
I'm new to Windows programming and trying to get the position of a TreeView's scroll bar.
SCROLLINFO scrollInfo;
ZeroMemory(&scrollInfo, sizeof(scrollInfo));
scrollInfo.cbSize = sizeof(scrollInfo);
scrollInfo.fMask = SIF_TRACKPOS;
tbool gotScrollInfo = GetScrollInfo(poTreeView->Handle, SB_VERT, &scrollInfo);
I get an error:
'BOOL GetScrollInfo(HWND,int,LPSCROLLINFO)': cannot convert argument 1 from 'System::IntPtr' to 'HWND'.
I've looked online and cannot find how to get from the TreeView pointer to an HWND. Windows' documentation assumes you already have the HWND.
I've seen other places where people use TreeView.hwnd or cast TreeView.Handle to an IntPtr - I guess the function used to take that instead of an HWND?
Does anyone know how to do this? this should be super simple, but I can't find the answer.
.net winapi treeview hwnd
.net winapi treeview hwnd
edited Nov 21 '18 at 1:54
Barmak Shemirani
21.6k42448
asked Nov 15 '18 at 16:14
Bob SBob S
4017
edited Nov 21 '18 at 1:54
Barmak Shemirani
21.6k42448
asked Nov 15 '18 at 16:14
Bob SBob S
4017
edited Nov 21 '18 at 1:54
Barmak Shemirani
21.6k42448
edited Nov 21 '18 at 1:54
Barmak Shemirani
21.6k42448
edited Nov 21 '18 at 1:54
Barmak Shemirani
21.6k42448
21.6k42448
asked Nov 15 '18 at 16:14
Bob SBob S
4017
asked Nov 15 '18 at 16:14
Bob SBob S
4017
asked Nov 15 '18 at 16:14
Bob SBob S
4017
4017
1
What language is that? Post your pinvoke call that you are using for GetScrollInfo. Generally, yes, treeView1.Handle is the HWND you are looking for.
– LarsTech
Nov 15 '18 at 23:16
The.nettag is useless. What language are you writing your code in? Managed or unmanaged? Where's your declaration forGetScrollInfo()?
– Ken White
Nov 15 '18 at 23:20
add a comment |
1
What language is that? Post your pinvoke call that you are using for GetScrollInfo. Generally, yes, treeView1.Handle is the HWND you are looking for.
– LarsTech
Nov 15 '18 at 23:16
The.nettag is useless. What language are you writing your code in? Managed or unmanaged? Where's your declaration forGetScrollInfo()?
– Ken White
Nov 15 '18 at 23:20
1
1
What language is that? Post your pinvoke call that you are using for GetScrollInfo. Generally, yes, treeView1.Handle is the HWND you are looking for.
– LarsTech
Nov 15 '18 at 23:16
What language is that? Post your pinvoke call that you are using for GetScrollInfo. Generally, yes, treeView1.Handle is the HWND you are looking for.
– LarsTech
Nov 15 '18 at 23:16
The
.net tag is useless. What language are you writing your code in? Managed or unmanaged? Where's your declaration for GetScrollInfo()?– Ken White
Nov 15 '18 at 23:20
The
.net tag is useless. What language are you writing your code in? Managed or unmanaged? Where's your declaration for GetScrollInfo()?– Ken White
Nov 15 '18 at 23:20
add a comment |
1 Answer
1
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Per the Control.Handle documentation:
An IntPtr that contains the window handle (HWND) of the control.
...
The value of the Handle property is a Windows HWND. If the handle has not yet been created, referencing this property will force the handle to be created.
So yes, you can simply type-cast the IntPtr to an HWND, eg:
(HWND)(poTreeView->Handle.ToPointer())
Or
static_cast<HWND>(poTreeView->Handle.ToPointer())
answered Nov 16 '18 at 1:23
Remy LebeauRemy Lebeau
340k19265459
add a comment |
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1 Answer
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1 Answer
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active
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Per the Control.Handle documentation:
An IntPtr that contains the window handle (HWND) of the control.
...
The value of the Handle property is a Windows HWND. If the handle has not yet been created, referencing this property will force the handle to be created.
So yes, you can simply type-cast the IntPtr to an HWND, eg:
(HWND)(poTreeView->Handle.ToPointer())
Or
static_cast<HWND>(poTreeView->Handle.ToPointer())
answered Nov 16 '18 at 1:23
Remy LebeauRemy Lebeau
340k19265459
add a comment |
Per the Control.Handle documentation:
An IntPtr that contains the window handle (HWND) of the control.
...
The value of the Handle property is a Windows HWND. If the handle has not yet been created, referencing this property will force the handle to be created.
So yes, you can simply type-cast the IntPtr to an HWND, eg:
(HWND)(poTreeView->Handle.ToPointer())
Or
static_cast<HWND>(poTreeView->Handle.ToPointer())
answered Nov 16 '18 at 1:23
Remy LebeauRemy Lebeau
340k19265459
add a comment |
Per the Control.Handle documentation:
An IntPtr that contains the window handle (HWND) of the control.
...
The value of the Handle property is a Windows HWND. If the handle has not yet been created, referencing this property will force the handle to be created.
So yes, you can simply type-cast the IntPtr to an HWND, eg:
(HWND)(poTreeView->Handle.ToPointer())
Or
static_cast<HWND>(poTreeView->Handle.ToPointer())
answered Nov 16 '18 at 1:23
Remy LebeauRemy Lebeau
340k19265459
Per the Control.Handle documentation:
An IntPtr that contains the window handle (HWND) of the control.
...
The value of the Handle property is a Windows HWND. If the handle has not yet been created, referencing this property will force the handle to be created.
So yes, you can simply type-cast the IntPtr to an HWND, eg:
(HWND)(poTreeView->Handle.ToPointer())
Or
static_cast<HWND>(poTreeView->Handle.ToPointer())
answered Nov 16 '18 at 1:23
Remy LebeauRemy Lebeau
340k19265459
answered Nov 16 '18 at 1:23
Remy LebeauRemy Lebeau
340k19265459
answered Nov 16 '18 at 1:23
Remy LebeauRemy Lebeau
340k19265459
answered Nov 16 '18 at 1:23
Remy LebeauRemy Lebeau
340k19265459
340k19265459
add a comment |
add a comment |
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1
What language is that? Post your pinvoke call that you are using for GetScrollInfo. Generally, yes, treeView1.Handle is the HWND you are looking for.
– LarsTech
Nov 15 '18 at 23:16
The
.nettag is useless. What language are you writing your code in? Managed or unmanaged? Where's your declaration forGetScrollInfo()?– Ken White
Nov 15 '18 at 23:20