回答編集履歴
2
常に最背面にする場合の方法を追加
test
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@@ -33,3 +33,89 @@
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[SetWindowPos (user32)](http://www.pinvoke.net/default.aspx/user32/SetWindowPos.html)
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---
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追記2
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常に最背面にしたいということであれば、以下のコードで実現できます。
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```C#
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public partial class Form1 : Form
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{
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private const int WM_WINDOWPOSCHANGING = 0x0046;
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private IntPtr HWND_BOTTOM = (IntPtr)1;
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[StructLayout(LayoutKind.Sequential)]
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public struct WINDOWPOS
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{
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public IntPtr hwnd;
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public IntPtr hwndInsertAfter;
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public int x;
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public int y;
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public int cx;
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public int cy;
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public uint flags;
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}
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public Form1()
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{
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InitializeComponent();
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}
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protected override void WndProc(ref Message m)
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{
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switch (m.Msg)
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{
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case WM_WINDOWPOSCHANGING:
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WINDOWPOS wp = (WINDOWPOS)Marshal.PtrToStructure(m.LParam, typeof(WINDOWPOS));
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wp.hwndInsertAfter = HWND_BOTTOM;
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Marshal.StructureToPtr(wp, m.LParam, true);
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break;
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}
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base.WndProc(ref m);
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}
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}
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```
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1
SetWindowPosの引数の解説を追記
test
CHANGED
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@@ -11,3 +11,25 @@
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この二つを組み合わせれば、お望みの動作が実現できると思います。
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---
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追記
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SetWindowPosのHWND_BOTTOMの値は、1です。
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uFlagsは、SWP_NOSIZE(値としては1)とSWP_NOMOVE(値としては2)のOR、すなわち3を渡してください。
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以下を参考にしてください。
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32
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33
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34
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35
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[SetWindowPos (user32)](http://www.pinvoke.net/default.aspx/user32/SetWindowPos.html)
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