WinForm special effect: make the two forms have activation effect at the same time, winform form

WinForm special effect: make the two forms have activation effect at the same time, winform form

Windows api. When a form is activated, a message is sent to another api.

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1. Using System;
3. Using System. Windows. Forms;
5. Using System. Runtime. InteropServices;
7. Namespace WindowsApplication43
9. {
11. Public partial class Form1: Form
13. {
15. Form frm = null;
17. Public Form1 ()
19. {
21. InitializeComponent ();
23. This. Activated + = Form_Activated;
25. }
27. Const int WM_NCACTIVATE = 0x86;
29. Const int WA_ACTIVE = 0x1;
31. [DllImport ("user32.dll", EntryPoint = "SendMessage")]
33. Public static extern int SendMessage (IntPtr hWnd, int wMsg, int wParam, int lParam );
35. Private void button#click (object sender, EventArgs e)
37. {
39. Frm = new Form ();
41. Frm. Text = "jinjazz ";
43. Frm. Activated + = Form_Activated;
45. Frm. Show ();
47. Frm. Location = new System. Drawing. Point (this. Left + this. Width, this. Top );
49. SendMessage (this. Handle, WM_NCACTIVATE, WA_ACTIVE, 0 );
51. }
53. Void Form_Activated (object sender, EventArgs e)
55. {
57. SendMessage (this. Handle, WM_NCACTIVATE, WA_ACTIVE, 0 );
59. If (frm! = Null)
61. SendMessage (frm. Handle, WM_NCACTIVATE, WA_ACTIVE, 0 );
63. }
65. }
67. }