Windows - Get HWND from TreeView for GetScrollInfo?
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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 at 1:54
Barmak Shemirani
20.7k42044
asked Nov 15 at 16:14
Bob S
2017
add a comment |
up vote
1
down vote
favorite
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 at 1:54
Barmak Shemirani
20.7k42044
asked Nov 15 at 16:14
Bob S
2017
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 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 at 23:20
add a comment |
up vote
1
down vote
favorite
up vote
1
down vote
favorite
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 at 1:54
Barmak Shemirani
20.7k42044
asked Nov 15 at 16:14
Bob S
2017
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 at 1:54
Barmak Shemirani
20.7k42044
asked Nov 15 at 16:14
Bob S
2017
edited Nov 21 at 1:54
Barmak Shemirani
20.7k42044
asked Nov 15 at 16:14
Bob S
2017
edited Nov 21 at 1:54
Barmak Shemirani
20.7k42044
edited Nov 21 at 1:54
Barmak Shemirani
20.7k42044
edited Nov 21 at 1:54
Barmak Shemirani
20.7k42044
20.7k42044
asked Nov 15 at 16:14
Bob S
2017
asked Nov 15 at 16:14
Bob S
2017
asked Nov 15 at 16:14
Bob S
2017
2017
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 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 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 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 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 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 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 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 at 23:20
add a comment |
1 Answer
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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 at 1:23
Remy Lebeau
329k18248437
add a comment |
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
accepted
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 at 1:23
Remy Lebeau
329k18248437
add a comment |
up vote
1
down vote
accepted
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 at 1:23
Remy Lebeau
329k18248437
add a comment |
up vote
1
down vote
accepted
up vote
1
down vote
accepted
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 at 1:23
Remy Lebeau
329k18248437
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 at 1:23
Remy Lebeau
329k18248437
answered Nov 16 at 1:23
Remy Lebeau
329k18248437
answered Nov 16 at 1:23
Remy Lebeau
329k18248437
answered Nov 16 at 1:23
Remy Lebeau
329k18248437
329k18248437
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 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 at 23:20