本文整理汇总了C#中System.Windows.Forms.NativeWindow.OnHandleChange方法的典型用法代码示例。如果您正苦于以下问题：C# NativeWindow.OnHandleChange方法的具体用法？C# NativeWindow.OnHandleChange怎么用？C# NativeWindow.OnHandleChange使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Windows.Forms.NativeWindow的用法示例。
在下文中一共展示了NativeWindow.OnHandleChange方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: MyNativeWindow
// MyNativeWindow class to create a window given a class name.
[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")]
internal class MyNativeWindow : NativeWindow
{
// Constant values were found in the "windows.h" header file.
private const int WS_CHILD = 0x40000000,
WS_VISIBLE = 0x10000000,
WM_ACTIVATEAPP = 0x001C;
private int windowHandle;
public MyNativeWindow(Form parent)
{
CreateParams cp = new CreateParams();
// Fill in the CreateParams details.
cp.Caption = "Click here";
cp.ClassName = "Button";
// Set the position on the form
cp.X = 100;
cp.Y = 100;
cp.Height = 100;
cp.Width = 100;
// Specify the form as the parent.
cp.Parent = parent.Handle;
// Create as a child of the specified parent
cp.Style = WS_CHILD | WS_VISIBLE;
// Create the actual window
this.CreateHandle(cp);
}
// Listen to when the handle changes to keep the variable in sync
[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")]
protected override void OnHandleChange()
{
windowHandle = (int)this.Handle;
}
[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")]
protected override void WndProc(ref Message m)
{
// Listen for messages that are sent to the button window. Some messages are sent
// to the parent window instead of the button's window.
switch (m.Msg)
{
case WM_ACTIVATEAPP:
// Do something here in response to messages
break;
}
base.WndProc(ref m);
}
}