Winform 拦截最小化、最大化、关闭事件【整理】

 1 const int WM_SYSCOMMAND = 0x112;
 2 //窗体关闭消息
 3 const int SC_CLOSE = 0xf060;
 4 //窗体最小化消息
 5 const int SC_MINIMIZE = 0xf020;
 6 //窗体最大化消息
 7 const int SC_MAXIMIZE = 0xf030;
 8 //窗体还原消息
 9 const int SC_NOMAL = 0xf120;
10 //窗体还原消息
11 const int SC_RESTORE = 61728;
12
13 //窗体按钮的拦截函数
14 protected override void WndProc(ref Message m)
15 {
16
17 if (m.Msg == WM_SYSCOMMAND)
18 {
19 //If m.WParam.ToInt32() = SC_RESTORE Then
20 // ‘拦截还原按钮
21 // Exit Sub
22 //End If
23
24 if (m.WParam.ToInt32() == SC_NOMAL)
25 {
26 //拦截还原按钮
27
28 return;
29 }
30 //if (m.WParam.ToInt32() == SC_MINIMIZE)
31 //{
32 // //拦截最小化按钮
33 // //这里写操作代码
34
35 // return;
36 //}
37 if (m.WParam.ToInt32() == SC_MAXIMIZE)
38 {
39 //拦截窗体最大化按钮
40 //.....................
41
42 return;
43 }
44
45
46 //窗体关闭消息
47 if (m.WParam.ToInt32() == SC_CLOSE)
48 {
49 if (MessageBox.Show("您确认要退出吗？", "", MessageBoxButtons.OKCancel) == DialogResult.OK)
50 {
51 System.Environment.Exit(System.Environment.ExitCode);
52 }
53 else
54 {
55 return;
56 }
57
58 }
59 }
60 base.WndProc(ref m);
61
62 }
63
64
65 }

VB

 1  Const WM_SYSCOMMAND As Integer = &H112
 2     Const SC_CLOSE As Integer = &HF060 ‘窗体关闭消息
 3     Const SC_MINIMIZE As Integer = &HF020 ‘窗体最小化消息
 4     Const SC_MAXIMIZE As Integer = &HF030 ‘窗体最大化消息
 5     Const SC_NOMAL As Integer = &HF120 ‘窗体还原消息
 6     Const SC_RESTORE As Integer = 61728 ‘窗体还原消息
 7
 8     ‘窗体按钮的拦截函数
 9     Protected Overrides Sub WndProc(ByRef m As Message)
10
11             If m.Msg = WM_SYSCOMMAND Then
12                 ‘If m.WParam.ToInt32() = SC_RESTORE Then
13                 ‘    ‘拦截还原按钮
14                 ‘    Exit Sub
15                 ‘End If
16
17                 If m.WParam.ToInt32() = SC_NOMAL Then
18                     ‘拦截还原按钮
19
20                     Exit Sub
21                 End If
22                 If m.WParam.ToInt32() = SC_MINIMIZE Then
23                     ‘拦截最小化按钮
24                     ‘这里写操作代码
25
26                     Exit Sub
27                 End If
28                 If m.WParam.ToInt32() = SC_MAXIMIZE Then
29                     ‘拦截窗体最大化按钮
30                     ‘.....................
31
32                     Exit Sub
33                 End If
34                 ‘拦截双击标题栏、移动窗体的系统消息
35                 If m.Msg <> &HA3 AndAlso m.Msg <> &H3 AndAlso m.WParam <> &HF012 Then
36                     MyBase.WndProc(m)
37                 End If
38
39                 If m.WParam.ToInt32() = SC_CLOSE Then
40
41                     Exit Sub
42
43                 End If
44             End If
45             MyBase.WndProc(m)
46
47     End Sub

最小化、最大化、关闭按钮不显示

this.ControlBox = false;   // 设置不出现关闭按钮