How does one load a hidden form in VB.NET? There doesn't seem to be a design
time "visible" property any more?
10  8468 
You can use the Hide and Show methods of the Form class.
--
Carsten Thomsen
Communities - http://community.integratedsolutions.dk
---------
Voodoo Programming: Things programmers do that they know shouldn't work but
they try anyway, and which sometimes actually work, such as recompiling
everything. (Karl Lehenbauer)
---------
"Dan" <Da*@discussions.microsoft.com> wrote in message
news:8C**********************************@microsof t.com... How does one load a hidden form in VB.NET? There doesn't seem to be a
design
time "visible" property any more?
I just tried that, and got an "Error creating window handle" exception on the
SendMessage call when running the following code:
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA"
(ByVal hwnd As Integer, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal
lParam As Integer) As Integer
Dim testform As New Form2
testform.Hide()
SendMessage(testform.Handle.ToInt32, &H8000, 0, 0)
Anybody know what's going on?
"CT" wrote: You can use the Hide and Show methods of the Form class.
--
Carsten Thomsen
Communities - http://community.integratedsolutions.dk
---------
Voodoo Programming: Things programmers do that they know shouldn't work but
they try anyway, and which sometimes actually work, such as recompiling
everything. (Karl Lehenbauer)
---------
"Dan" <Da*@discussions.microsoft.com> wrote in message
news:8C**********************************@microsof t.com... How does one load a hidden form in VB.NET? There doesn't seem to be a
design
time "visible" property any more?
Dan,
You can change the API Declare to this:
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA"
(ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal
lParam As Integer) As Integer
--
Carsten Thomsen
Communities - http://community.integratedsolutions.dk
---------
Voodoo Programming: Things programmers do that they know shouldn't work but
they try anyway, and which sometimes actually work, such as recompiling
everything. (Karl Lehenbauer)
---------
"Dan" <Da*@discussions.microsoft.com> wrote in message
news:3D**********************************@microsof t.com... I just tried that, and got an "Error creating window handle" exception on
the
SendMessage call when running the following code:
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA"
(ByVal hwnd As Integer, ByVal wMsg As Integer, ByVal wParam As Integer,
ByVal
lParam As Integer) As Integer
Dim testform As New Form2
testform.Hide()
SendMessage(testform.Handle.ToInt32, &H8000, 0, 0)
Anybody know what's going on?
"CT" wrote:
You can use the Hide and Show methods of the Form class.
--
Carsten Thomsen
Communities - http://community.integratedsolutions.dk
---------
Voodoo Programming: Things programmers do that they know shouldn't work
but
they try anyway, and which sometimes actually work, such as recompiling
everything. (Karl Lehenbauer)
---------
"Dan" <Da*@discussions.microsoft.com> wrote in message
news:8C**********************************@microsof t.com... > How does one load a hidden form in VB.NET? There doesn't seem to be a
> design
> time "visible" property any more?
Carsten,
I did that, but it didn't fix the problem.
Dan
"CT" wrote: Dan,
You can change the API Declare to this:
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA"
(ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal
lParam As Integer) As Integer
--
Carsten Thomsen
Communities - http://community.integratedsolutions.dk
---------
Voodoo Programming: Things programmers do that they know shouldn't work but
they try anyway, and which sometimes actually work, such as recompiling
everything. (Karl Lehenbauer)
---------
"Dan" <Da*@discussions.microsoft.com> wrote in message
news:3D**********************************@microsof t.com...I just tried that, and got an "Error creating window handle" exception on
the
SendMessage call when running the following code:
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA"
(ByVal hwnd As Integer, ByVal wMsg As Integer, ByVal wParam As Integer,
ByVal
lParam As Integer) As Integer
Dim testform As New Form2
testform.Hide()
SendMessage(testform.Handle.ToInt32, &H8000, 0, 0)
Anybody know what's going on?
"CT" wrote:
You can use the Hide and Show methods of the Form class.
--
Carsten Thomsen
Communities - http://community.integratedsolutions.dk
---------
Voodoo Programming: Things programmers do that they know shouldn't work
but
they try anyway, and which sometimes actually work, such as recompiling
everything. (Karl Lehenbauer)
---------
"Dan" <Da*@discussions.microsoft.com> wrote in message
news:8C**********************************@microsof t.com...
> How does one load a hidden form in VB.NET? There doesn't seem to be a
> design
> time "visible" property any more?
Okay, I'm not sure what message it is you're sending, but if you use the
suggested SendMessage Declare, and this call, do you still experience the
problem?
SendMessage(testform.Handle, &H8000, 0, 0)
--
Carsten Thomsen
Communities - http://community.integratedsolutions.dk
---------
Voodoo Programming: Things programmers do that they know shouldn't work but
they try anyway, and which sometimes actually work, such as recompiling
everything. (Karl Lehenbauer)
---------
"Dan" <Da*@discussions.microsoft.com> wrote in message
news:EE**********************************@microsof t.com... Carsten,
I did that, but it didn't fix the problem.
Dan
"CT" wrote:
Dan,
You can change the API Declare to this:
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA"
(ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer,
ByVal
lParam As Integer) As Integer
--
Carsten Thomsen
Communities - http://community.integratedsolutions.dk
---------
Voodoo Programming: Things programmers do that they know shouldn't work
but
they try anyway, and which sometimes actually work, such as recompiling
everything. (Karl Lehenbauer)
---------
"Dan" <Da*@discussions.microsoft.com> wrote in message
news:3D**********************************@microsof t.com... >I just tried that, and got an "Error creating window handle" exception
>on
>the
> SendMessage call when running the following code:
>
> Private Declare Function SendMessage Lib "user32" Alias "SendMessageA"
> (ByVal hwnd As Integer, ByVal wMsg As Integer, ByVal wParam As Integer,
> ByVal
> lParam As Integer) As Integer
>
> Dim testform As New Form2
> testform.Hide()
> SendMessage(testform.Handle.ToInt32, &H8000, 0, 0)
>
> Anybody know what's going on?
>
> "CT" wrote:
>
>> You can use the Hide and Show methods of the Form class.
>>
>> --
>> Carsten Thomsen
>> Communities - http://community.integratedsolutions.dk
>> ---------
>> Voodoo Programming: Things programmers do that they know shouldn't
>> work
>> but
>> they try anyway, and which sometimes actually work, such as
>> recompiling
>> everything. (Karl Lehenbauer)
>> ---------
>> "Dan" <Da*@discussions.microsoft.com> wrote in message
>> news:8C**********************************@microsof t.com...
>> > How does one load a hidden form in VB.NET? There doesn't seem to be
>> > a
>> > design
>> > time "visible" property any more?
>>
>>
>>
What are trying to do? Perhaps there is an alternate way to do what
you want to do?
Chris-- I am trying to subclass an invisible windows form by overriding its
WndProc method so that I can send custom messages to it from another process.
Carsten--I did exactly what you recommended with no luck
....Dan
"Chris Dunaway" wrote: What are trying to do? Perhaps there is an alternate way to do what
you want to do?
> How does one load a hidden form in VB.NET? There doesn't seem to be a design time "visible" property any more?
At the top of the form's Load event, call Hide.
I figured out the problem. When I overrode the WndProc method in my form, I
forgot to pass along the messages via MyBase.WndProc(msg) before existing my
override.
Also, it seems that I can create the window without showing by simply
creating a new instance of the form without showing it.
Thanks very much for your help.
Dan
"CT" wrote: Okay, I'm not sure what message it is you're sending, but if you use the
suggested SendMessage Declare, and this call, do you still experience the
problem?
SendMessage(testform.Handle, &H8000, 0, 0)
--
Carsten Thomsen
Communities - http://community.integratedsolutions.dk
---------
Voodoo Programming: Things programmers do that they know shouldn't work but
they try anyway, and which sometimes actually work, such as recompiling
everything. (Karl Lehenbauer)
---------
"Dan" <Da*@discussions.microsoft.com> wrote in message
news:EE**********************************@microsof t.com... Carsten,
I did that, but it didn't fix the problem.
Dan
"CT" wrote:
Dan,
You can change the API Declare to this:
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA"
(ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer,
ByVal
lParam As Integer) As Integer
--
Carsten Thomsen
Communities - http://community.integratedsolutions.dk
---------
Voodoo Programming: Things programmers do that they know shouldn't work
but
they try anyway, and which sometimes actually work, such as recompiling
everything. (Karl Lehenbauer)
---------
"Dan" <Da*@discussions.microsoft.com> wrote in message
news:3D**********************************@microsof t.com...
>I just tried that, and got an "Error creating window handle" exception
>on
>the
> SendMessage call when running the following code:
>
> Private Declare Function SendMessage Lib "user32" Alias "SendMessageA"
> (ByVal hwnd As Integer, ByVal wMsg As Integer, ByVal wParam As Integer,
> ByVal
> lParam As Integer) As Integer
>
> Dim testform As New Form2
> testform.Hide()
> SendMessage(testform.Handle.ToInt32, &H8000, 0, 0)
>
> Anybody know what's going on?
>
> "CT" wrote:
>
>> You can use the Hide and Show methods of the Form class.
>>
>> --
>> Carsten Thomsen
>> Communities - http://community.integratedsolutions.dk
>> ---------
>> Voodoo Programming: Things programmers do that they know shouldn't
>> work
>> but
>> they try anyway, and which sometimes actually work, such as
>> recompiling
>> everything. (Karl Lehenbauer)
>> ---------
>> "Dan" <Da*@discussions.microsoft.com> wrote in message
>> news:8C**********************************@microsof t.com...
>> > How does one load a hidden form in VB.NET? There doesn't seem to be
>> > a
>> > design
>> > time "visible" property any more?
>>
>>
>>
"Dan" <Da*@discussions.microsoft.com> wrote in message
news:8C**********************************@microsof t.com... How does one load a hidden form in VB.NET?
You create an instance of the Form's class and use it like any other
class. It's only when you call the [Form] object's Show method
that anyone gets to see it.
HTH,
Phill W. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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