我遇到了一个问题。我有一个 .net 用户控件，上面有一个 splitcontainer 控件。.net 用户控件实际上托管在更旧的非 .net 遗留代码（可视对象）中的控件容器中。
我遇到的问题是，当将用户控件呈现给用户时，我在 splitcontainer 控件上触发了一个 splitter_moved 事件，但是我无法找到导致它实际移动的原因。在 VO 代码和 .net 内容之间的这种交互中，我遇到了许多奇怪的行为，但是我在 VO 容器控件中嵌入了其他几个用户控件，它们工作得很好。只是这个特殊的似乎有问题。
VO 容器控件都是相同的。嵌入其中的 .net 用户控件也是如此（它们都继承自同一个基类）。这就是为什么我很难理解为什么只有这个。
我想我真正想知道的是如何确定是什么导致拆分器在 splitcontainer 控件内移动。sender 和 eventargs 没有多大帮助，因为它们都只是引用 splitcontainer 控件（显然）。
帮助？？
编辑： splitter_moved 事件处理程序中的调用堆栈如下：
00000072 0.26412687 Method: Void splitContainerMain_SplitterMoved(System.Object, System.Windows.Forms.SplitterEventArgs)
00000073 0.26649699 Method: Void OnSplitterMoved(System.Windows.Forms.SplitterEventArgs)
00000074 0.26906940 Method: Void set_SplitterDistance(Int32)
00000075 0.27223459 Method: Void ApplySplitterDistance()
00000076 0.27425244 Method: Void ResizeSplitContainer()
00000077 0.27621472 Method: Void OnLayout(System.Windows.Forms.LayoutEventArgs)
00000078 0.27813032 Method: Void PerformLayout(System.Windows.Forms.LayoutEventArgs)
00000079 0.28007442 Method: Void System.Windows.Forms.Layout.IArrangedElement.PerformLayout(System.Windows.Forms.Layout.IArrangedElement, System.String)
00000080 0.28211826 Method: Void DoLayout(System.Windows.Forms.Layout.IArrangedElement, System.Windows.Forms.Layout.IArrangedElement, System.String)
00000081 0.28451827 Method: Void OnResize(System.EventArgs)
00000082 0.28713536 Method: Void OnSizeChanged(System.EventArgs)
00000083 0.28970191 Method: Void UpdateBounds(Int32, Int32, Int32, Int32, Int32, Int32)
00000084 0.29425862 Method: Void UpdateBounds()
00000085 0.29450893 Method: Void WmWindowPosChanged(System.Windows.Forms.Message ByRef)
00000086 0.29477015 Method: Void WndProc(System.Windows.Forms.Message ByRef)
00000087 0.29508862 Method: Void WndProc(System.Windows.Forms.Message ByRef)
00000088 0.29539761 Method: Void WndProc(System.Windows.Forms.Message ByRef)
00000089 0.29568058 Method: Void WndProc(System.Windows.Forms.Message ByRef)
00000090 0.29596806 Method: Void OnMessage(System.Windows.Forms.Message ByRef)
00000091 0.29627341 Method: Void WndProc(System.Windows.Forms.Message ByRef)
00000092 0.29659048 Method: IntPtr Callback(IntPtr, Int32, IntPtr, IntPtr)
00000093 0.29688439 Method: Boolean SetWindowPos(System.Runtime.InteropServices.HandleRef, System.Runtime.InteropServices.HandleRef, Int32, Int32, Int32, Int32, Int32)
00000094 0.29714754 Method: Void SetBoundsCore(Int32, Int32, Int32, Int32, System.Windows.Forms.BoundsSpecified)
00000095 0.29755905 Method: Void SetBoundsCore(Int32, Int32, Int32, Int32, System.Windows.Forms.BoundsSpecified)
00000096 0.29781467 Method: Void System.Windows.Forms.Layout.IArrangedElement.SetBounds(System.Drawing.Rectangle, System.Windows.Forms.BoundsSpecified)
00000097 0.29814151 Method: Void xLayoutDockedControl(System.Windows.Forms.Layout.IArrangedElement, System.Drawing.Rectangle, Boolean, System.Drawing.Size ByRef, System.Drawing.Rectangle ByRef)
00000098 0.29844967 Method: System.Drawing.Size LayoutDockedControls(System.Windows.Forms.Layout.IArrangedElement, Boolean)
00000099 0.29872790 Method: Boolean xLayout(System.Windows.Forms.Layout.IArrangedElement, Boolean, System.Drawing.Size ByRef)
00000100 0.29901370 Method: Boolean LayoutCore(System.Windows.Forms.Layout.IArrangedElement, System.Windows.Forms.LayoutEventArgs)
00000101 0.29931039 Method: Boolean Layout(System.Object, System.Windows.Forms.LayoutEventArgs)
00000102 0.29965651 Method: Void OnLayout(System.Windows.Forms.LayoutEventArgs)
00000103 0.29993618 Method: Void OnLayout(System.Windows.Forms.LayoutEventArgs)
00000104 0.30027559 Method: Void OnLayout(System.Windows.Forms.LayoutEventArgs)
00000105 0.30064937 Method: Void PerformLayout(System.Windows.Forms.LayoutEventArgs)
00000106 0.30087790 Method: Void System.Windows.Forms.Layout.IArrangedElement.PerformLayout(System.Windows.Forms.Layout.IArrangedElement, System.String)
00000107 0.30116984 Method: Void DoLayout(System.Windows.Forms.Layout.IArrangedElement, System.Windows.Forms.Layout.IArrangedElement, System.String)
00000108 0.30157101 Method: Void OnResize(System.EventArgs)
00000109 0.30196688 Method: Void OnResize(System.EventArgs)
00000110 0.30212274 Method: Void OnSizeChanged(System.EventArgs)
00000111 0.30244765 Method: Void UpdateBounds(Int32, Int32, Int32, Int32, Int32, Int32)
00000112 0.30264741 Method: Void UpdateBounds()
00000113 0.30294549 Method: Void WmWindowPosChanged(System.Windows.Forms.Message ByRef)
00000114 0.30337656 Method: Void WndProc(System.Windows.Forms.Message ByRef)
00000115 0.30359614 Method: Void WndProc(System.Windows.Forms.Message ByRef)
00000116 0.30389002 Method: Void WndProc(System.Windows.Forms.Message ByRef)
00000117 0.30451524 Method: Void WndProc(System.Windows.Forms.Message ByRef)
00000118 0.30456889 Method: Void OnMessage(System.Windows.Forms.Message ByRef)
00000119 0.30483985 Method: Void WndProc(System.Windows.Forms.Message ByRef)
00000120 0.30507788 Method: IntPtr Callback(IntPtr, Int32, IntPtr, IntPtr)
00000121 0.30540919 Method: Boolean SetWindowPos(System.Runtime.InteropServices.HandleRef, System.Runtime.InteropServices.HandleRef, Int32, Int32, Int32, Int32, Int32)
00000122 0.30566931 Method: Void SetBoundsCore(Int32, Int32, Int32, Int32, System.Windows.Forms.BoundsSpecified)
00000123 0.30598581 Method: Void SetBounds(Int32, Int32, Int32, Int32, System.Windows.Forms.BoundsSpecified)
00000124 0.30637357 Method: Void set_Height(Int32)
00000125 0.30679765 Method: Void ContainerCtrl.ResizeForm(ContainerCtrl*, WTL.CRect)
00000126 0.30718428 Method: Int32 ContainerCtrl.OnSize(ContainerCtrl*, UInt32, UInt32, Int32, Int32*)
00000127 0.30755892 Method: Int32 ContainerCtrl.ProcessWindowMessage(ContainerCtrl*, HWND__*, UInt32, UInt32, Int32, Int32*, UInt32)
00000128 0.30793831 Method: Int32 ATL.CDialogImplBaseT<ATL::CWindow>.DialogProc(HWND__*, UInt32, UInt32, Int32)
00000129 0.30838418 Method: Int32 ATL.CAxDialogImpl<ContainerCtrl,ATL::CWindow>.DialogProc(HWND__*, UInt32, UInt32, Int32)
00000130 0.30881271 Method: Int32 SetWindowPos(HWND__*, HWND__*, Int32, Int32, Int32, Int32, UInt32)
00000131 0.30922171 Method: Int32 ATL.CComControlBase.IOleInPlaceObject_SetObjectRects(ATL.CComControlBase*, tagRECT*, tagRECT*)
00000132 0.30961114 Method: Int32 ATL.IOleInPlaceObjectWindowlessImpl<ContainerCtrl>.SetObjectRects(ATL.IOleInPlaceObjectWindowlessImpl<ContainerCtrl>*, tagRECT*, tagRECT*)
编辑：好的，看起来 VO 容器控件上的 resize 事件在向用户显示时正在触发此事件，但在其他事件上未触发。
很纠结？！？