窗体全透明但窗体上的控件不透明

 

相关资料：

https://www.iteye.com/blog/paulfzm-1835285

 

实例1：

 1 unit Unit1;
 2 
 3 interface
 4 
 5 uses
 6   Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
 7   Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.ComCtrls;
 8 
 9 type
10   TForm1 = class(TForm)
11     Button1: TButton;
12     ListBox1: TListBox;
13     Memo1: TMemo;
14     Edit1: TEdit;
15     ProgressBar1: TProgressBar;
16     TrackBar1: TTrackBar;
17     procedure Button1Click(Sender: TObject);
18   private
19     { Private declarations }
20   public
21     { Public declarations }
22   end;
23 
24 var
25   Form1: TForm1;
26 
27 implementation
28 
29 {$R *.dfm}
30 
31 procedure TForm1.Button1Click(Sender: TObject);
32 Var
33   frmRegion, tempRegion: HRGN;
34   I: Integer;
35   Arect: TRect;
36 Begin
37   frmRegion := 0;
38   For I:= 0 To ControlCount - 1 Do
39   Begin
40     aRect := Controls[I].BoundsRect;
41     OffsetRect(aRect, clientorigin.x - left, clientorigin.y - top);
42     tempRegion := CreateRectRgnIndirect(aRect);
43     If frmRegion = 0 Then
44       frmRegion := tempRegion
45     Else
46     Begin
47       CombineRgn(frmRegion, frmRegion, tempRegion, RGN_OR);
48       DeleteObject(tempRegion);
49     End;
50   End;
51   tempregion :=
52   CreateRectRgn( 0, 0, Width,
53                 GetSystemMetrics(SM_CYCAPTION)+
54                 GetSystemMetrics(SM_CYSIZEFRAME)+
55                 GetSystemMetrics(SM_CYMENU) * Ord(Menu <> Nil));
56 
57   CombineRgn(frmRegion, frmRegion, tempRegion, RGN_OR);
58   DeleteObject(tempRegion);
59   SetWindowRgn(handle, frmRegion, true);
60 end;
61 
62 end.

View Code

 

实例2：

 1 unit Unit1;
 2 
 3 interface
 4 
 5 uses
 6   Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
 7   Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls;
 8 
 9 type
10   TForm1 = class(TForm)
11     Button1: TButton;
12     Edit1: TEdit;
13     procedure FormCreate(Sender: TObject);
14   private
15     { Private declarations }
16   public
17     { Public declarations }
18   end;
19 
20 var
21   Form1: TForm1;
22 
23 implementation
24 
25 {$R *.dfm}
26 
27 procedure TForm1.FormCreate(Sender: TObject);
28 begin
29 form1.color:=clred;
30 form1.TransparentColorValue:=clred;
31 form1.TransparentColor:=true;
32 end;
33 
34 end.

View Code