This would have been better if I could have just implemented an interface or
two to author my own toolstrip controls... but no, I have to inherit from
just the existing ones. Fine, I thought...
Public Class GenericToolStri pComboBox(Of ItemType As New)
Inherits System.Windows. Forms.ToolStrip ComboBox
Generic combo boxes are sooo convenient, I really wanted to have them in my
toolstrip, too. So the first one I add of a particular type, I get the
exception below.
Charmingly, if I'm not in debug mode, this message pops up in an infinite
loop and I have to kill the process with Task Manager.
I want this fixed.
Paul
System.AccessVi olationExceptio n was unhandled
Message="Attemp ted to read or write protected memory. This is often an
indication that other memory is corrupt."
Source="System. Windows.Forms"
StackTrace:
at System.Windows. Forms.UnsafeNat iveMethods.Call WindowProc(IntP tr
wndProc, IntPtr hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)
at System.Windows. Forms.NativeWin dow.DefWndProc( Message& m)
at System.Windows. Forms.Control.D efWndProc(Messa ge& m)
at System.Windows. Forms.Control.W ndProc(Message& m)
at System.Windows. Forms.ComboBox. WndProc(Message & m)
at
System.Windows. Forms.Control.C ontrolNativeWin dow.OnMessage(M essage& m)
at System.Windows. Forms.Control.C ontrolNativeWin dow.WndProc(Mes sage&
m)
at System.Windows. Forms.NativeWin dow.DebuggableC allback(IntPtr hWnd,
Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows. Forms.UnsafeNat iveMethods.Send Message(HandleR ef
hWnd, Int32 msg, Int32 wParam, String lParam)
at System.Windows. Forms.Control.S endMessage(Int3 2 msg, Int32 wparam,
String lparam)
at System.Windows. Forms.ComboBox. NativeAdd(Objec t item)
at System.Windows. Forms.ComboBox. OnHandleCreated (EventArgs e)
at System.Windows. Forms.Control.W mCreate(Message & m)
at System.Windows. Forms.Control.W ndProc(Message& m)
at System.Windows. Forms.ComboBox. WndProc(Message & m)
at
System.Windows. Forms.Control.C ontrolNativeWin dow.OnMessage(M essage& m)
at System.Windows. Forms.Control.C ontrolNativeWin dow.WndProc(Mes sage&
m)
at System.Windows. Forms.NativeWin dow.DebuggableC allback(IntPtr hWnd,
Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows. Forms.UnsafeNat iveMethods.IntC reateWindowEx(I nt32
dwExStyle, String lpszClassName, String lpszWindowName, Int32 style, Int32
x, Int32 y, Int32 width, Int32 height, HandleRef hWndParent, HandleRef
hMenu, HandleRef hInst, Object pvParam)
at System.Windows. Forms.UnsafeNat iveMethods.Crea teWindowEx(Int3 2
dwExStyle, String lpszClassName, String lpszWindowName, Int32 style, Int32
x, Int32 y, Int32 width, Int32 height, HandleRef hWndParent, HandleRef
hMenu, HandleRef hInst, Object pvParam)
at System.Windows. Forms.NativeWin dow.CreateHandl e(CreateParams cp)
at System.Windows. Forms.Control.C reateHandle()
at System.Windows. Forms.ComboBox. CreateHandle()
at System.Windows. Forms.Control.C reateControl(Bo olean fIgnoreVisible)
at System.Windows. Forms.Control.C reateControl(Bo olean fIgnoreVisible)
at System.Windows. Forms.Control.C reateControl(Bo olean fIgnoreVisible)
at System.Windows. Forms.Control.C reateControl(Bo olean fIgnoreVisible)
at System.Windows. Forms.Control.C reateControl(Bo olean fIgnoreVisible)
at System.Windows. Forms.Control.C reateControl()
at System.Windows. Forms.Control.W mShowWindow(Mes sage& m)
at System.Windows. Forms.Control.W ndProc(Message& m)
at System.Windows. Forms.Scrollabl eControl.WndPro c(Message& m)
at System.Windows. Forms.Container Control.WndProc (Message& m)
at System.Windows. Forms.Form.WmSh owWindow(Messag e& m)
at System.Windows. Forms.Form.WndP roc(Message& m)
at
System.Windows. Forms.Control.C ontrolNativeWin dow.OnMessage(M essage& m)
at System.Windows. Forms.Control.C ontrolNativeWin dow.WndProc(Mes sage&
m)
at System.Windows. Forms.NativeWin dow.DebuggableC allback(IntPtr hWnd,
Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows. Forms.SafeNativ eMethods.ShowWi ndow(HandleRef hWnd,
Int32 nCmdShow)
at System.Windows. Forms.Control.S etVisibleCore(B oolean value)
at System.Windows. Forms.Form.SetV isibleCore(Bool ean value)
at System.Windows. Forms.Control.s et_Visible(Bool ean value)
at
System.Windows. Forms.Applicati on.ThreadContex t.RunMessageLoo pInner(Int32
reason, ApplicationCont ext context)
at
System.Windows. Forms.Applicati on.ThreadContex t.RunMessageLoo p(Int32 reason,
ApplicationCont ext context)
at System.Windows. Forms.Form.Show Dialog(IWin32Wi ndow owner)
at System.Windows. Forms.Form.Show Dialog()
at RateSheet.Main. ShowMainForm() in C:\Documents and
Settings\Develo per\My Documents\Visua l Studio
2005\Projects\R ateSheet\RateSh eet\Main.vb:lin e 15
at RateSheet.Main. main() in C:\Documents and Settings\Develo per\My
Documents\Visua l Studio 2005\Projects\R ateSheet\RateSh eet\Main.vb:lin e 5
at System.AppDomai n.nExecuteAssem bly(Assembly assembly, String[]
args)
at System.AppDomai n.ExecuteAssemb ly(String assemblyFile, Evidence
assemblySecurit y, String[] args)
at Microsoft.Visua lStudio.Hosting Process.HostPro c.RunUsersAssem bly()
at System.Threadin g.ThreadHelper. ThreadStart_Con text(Object state)
at System.Threadin g.ExecutionCont ext.Run(Executi onContext
executionContex t, ContextCallback callback, Object state)
at System.Threadin g.ThreadHelper. ThreadStart()
1  2495 
OK my bad, sort of. I had support transparent colors set to true, and
apparently the combo box in general (whether in a toolstrip or not) just
won't have any of that. It's not exactly news that the base combo class is
buggy... so never mind. *gumble*
Paul
"PJ6" <no***@nowhere. net> wrote in message
news:Of******** ******@TK2MSFTN GP05.phx.gbl... This would have been better if I could have just implemented an interface
or two to author my own toolstrip controls... but no, I have to inherit
from just the existing ones. Fine, I thought...
Public Class GenericToolStri pComboBox(Of ItemType As New)
Inherits System.Windows. Forms.ToolStrip ComboBox
Generic combo boxes are sooo convenient, I really wanted to have them in
my toolstrip, too. So the first one I add of a particular type, I get the
exception below.
Charmingly, if I'm not in debug mode, this message pops up in an infinite
loop and I have to kill the process with Task Manager.
I want this fixed.
Paul
System.AccessVi olationExceptio n was unhandled
Message="Attemp ted to read or write protected memory. This is often an
indication that other memory is corrupt."
Source="System. Windows.Forms"
StackTrace:
at System.Windows. Forms.UnsafeNat iveMethods.Call WindowProc(IntP tr
wndProc, IntPtr hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)
at System.Windows. Forms.NativeWin dow.DefWndProc( Message& m)
at System.Windows. Forms.Control.D efWndProc(Messa ge& m)
at System.Windows. Forms.Control.W ndProc(Message& m)
at System.Windows. Forms.ComboBox. WndProc(Message & m)
at
System.Windows. Forms.Control.C ontrolNativeWin dow.OnMessage(M essage& m)
at System.Windows. Forms.Control.C ontrolNativeWin dow.WndProc(Mes sage&
m)
at System.Windows. Forms.NativeWin dow.DebuggableC allback(IntPtr hWnd,
Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows. Forms.UnsafeNat iveMethods.Send Message(HandleR ef
hWnd, Int32 msg, Int32 wParam, String lParam)
at System.Windows. Forms.Control.S endMessage(Int3 2 msg, Int32 wparam,
String lparam)
at System.Windows. Forms.ComboBox. NativeAdd(Objec t item)
at System.Windows. Forms.ComboBox. OnHandleCreated (EventArgs e)
at System.Windows. Forms.Control.W mCreate(Message & m)
at System.Windows. Forms.Control.W ndProc(Message& m)
at System.Windows. Forms.ComboBox. WndProc(Message & m)
at
System.Windows. Forms.Control.C ontrolNativeWin dow.OnMessage(M essage& m)
at System.Windows. Forms.Control.C ontrolNativeWin dow.WndProc(Mes sage&
m)
at System.Windows. Forms.NativeWin dow.DebuggableC allback(IntPtr hWnd,
Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows. Forms.UnsafeNat iveMethods.IntC reateWindowEx(I nt32
dwExStyle, String lpszClassName, String lpszWindowName, Int32 style, Int32
x, Int32 y, Int32 width, Int32 height, HandleRef hWndParent, HandleRef
hMenu, HandleRef hInst, Object pvParam)
at System.Windows. Forms.UnsafeNat iveMethods.Crea teWindowEx(Int3 2
dwExStyle, String lpszClassName, String lpszWindowName, Int32 style, Int32
x, Int32 y, Int32 width, Int32 height, HandleRef hWndParent, HandleRef
hMenu, HandleRef hInst, Object pvParam)
at System.Windows. Forms.NativeWin dow.CreateHandl e(CreateParams cp)
at System.Windows. Forms.Control.C reateHandle()
at System.Windows. Forms.ComboBox. CreateHandle()
at System.Windows. Forms.Control.C reateControl(Bo olean
fIgnoreVisible)
at System.Windows. Forms.Control.C reateControl(Bo olean
fIgnoreVisible)
at System.Windows. Forms.Control.C reateControl(Bo olean
fIgnoreVisible)
at System.Windows. Forms.Control.C reateControl(Bo olean
fIgnoreVisible)
at System.Windows. Forms.Control.C reateControl(Bo olean
fIgnoreVisible)
at System.Windows. Forms.Control.C reateControl()
at System.Windows. Forms.Control.W mShowWindow(Mes sage& m)
at System.Windows. Forms.Control.W ndProc(Message& m)
at System.Windows. Forms.Scrollabl eControl.WndPro c(Message& m)
at System.Windows. Forms.Container Control.WndProc (Message& m)
at System.Windows. Forms.Form.WmSh owWindow(Messag e& m)
at System.Windows. Forms.Form.WndP roc(Message& m)
at
System.Windows. Forms.Control.C ontrolNativeWin dow.OnMessage(M essage& m)
at System.Windows. Forms.Control.C ontrolNativeWin dow.WndProc(Mes sage&
m)
at System.Windows. Forms.NativeWin dow.DebuggableC allback(IntPtr hWnd,
Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows. Forms.SafeNativ eMethods.ShowWi ndow(HandleRef hWnd,
Int32 nCmdShow)
at System.Windows. Forms.Control.S etVisibleCore(B oolean value)
at System.Windows. Forms.Form.SetV isibleCore(Bool ean value)
at System.Windows. Forms.Control.s et_Visible(Bool ean value)
at
System.Windows. Forms.Applicati on.ThreadContex t.RunMessageLoo pInner(Int32
reason, ApplicationCont ext context)
at
System.Windows. Forms.Applicati on.ThreadContex t.RunMessageLoo p(Int32
reason, ApplicationCont ext context)
at System.Windows. Forms.Form.Show Dialog(IWin32Wi ndow owner)
at System.Windows. Forms.Form.Show Dialog()
at RateSheet.Main. ShowMainForm() in C:\Documents and
Settings\Develo per\My Documents\Visua l Studio
2005\Projects\R ateSheet\RateSh eet\Main.vb:lin e 15
at RateSheet.Main. main() in C:\Documents and Settings\Develo per\My
Documents\Visua l Studio 2005\Projects\R ateSheet\RateSh eet\Main.vb:lin e 5
at System.AppDomai n.nExecuteAssem bly(Assembly assembly, String[]
args)
at System.AppDomai n.ExecuteAssemb ly(String assemblyFile, Evidence
assemblySecurit y, String[] args)
at Microsoft.Visua lStudio.Hosting Process.HostPro c.RunUsersAssem bly()
at System.Threadin g.ThreadHelper. ThreadStart_Con text(Object state)
at System.Threadin g.ExecutionCont ext.Run(Executi onContext
executionContex t, ContextCallback callback, Object state)
at System.Threadin g.ThreadHelper. ThreadStart()
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