Delphi Tips & Trick

Yahoo Messenger Robot

2008-03-24T02:26:00.000-07:00

Free Yahoo Robot Messenger is auto response Yahoo Mess program. Message Response taking from database. This program is free using Bricksoft IM(MSN,YAHOO,AIM) VCL Component(Unregistered Version).

for download program please klik
http://www.2shared.com/file/3035373/be70d67c/ymrobot.html
http://www.2shared.com/fadmin/3035373/8c972f85/ymrobot.zip

Shape a form to a bitmap

2008-03-07T18:58:00.000-08:00

{ Fill bitmap to Form
}
unit Unit1;

interface

uses
Windows, Classes, SysUtils, Graphics, Forms;

type
TRGBArray = array[0..32767] of TRGBTriple;
PRGBArray = ^TRGBArray;

type
TForm1 = class(TForm)
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
private
{ Private declarations }
FRegion: THandle;
function CreateRegion(Bmp: TBitmap): THandle;
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

function TForm1.CreateRegion(Bmp: TBitmap): THandle;
var
X, Y, StartX: Integer;
Excl: THandle;
Row: PRGBArray;
TransparentColor: TRGBTriple;
begin
Bmp.PixelFormat := pf24Bit;

Result := CreateRectRGN(0, 0, Bmp.Width, Bmp.Height);

for Y := 0 to Bmp.Height - 1 do
begin
Row := Bmp.Scanline[Y];

StartX := -1;

if Y = 0 then
TransparentColor := Row[0];

for X := 0 to Bmp.Width - 1 do
begin
if (Row[X].rgbtRed = TransparentColor.rgbtRed) and
(Row[X].rgbtGreen = TransparentColor.rgbtGreen) and
(Row[X].rgbtBlue = TransparentColor.rgbtBlue) then
begin
if StartX = -1 then StartX := X;
end
else
begin
if StartX > -1 then
begin
Excl := CreateRectRGN(StartX, Y, X + 1, Y + 1);
try
CombineRGN(Result, Result, Excl, RGN_DIFF);
StartX := -1;
finally
DeleteObject(Excl);
end;
end;
end;
end;

if StartX > -1 then
begin
Excl := CreateRectRGN(StartX, Y, Bmp.Width, Y + 1);
try
CombineRGN(Result, Result, Excl, RGN_DIFF);
finally
DeleteObject(Excl);
end;
end;
end;
end;

procedure TForm1.FormCreate(Sender: TObject);
var
Bmp: TBitmap;
begin
Bmp := TBitmap.Create;
try
Bmp.LoadFromFile('C:\YourBitmap.bmp');
FRegion := CreateRegion(Bmp);
SetWindowRGN(Handle, FRegion, True);
finally
Bmp.Free;
end;
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
DeleteObject(FRegion);
end;

end.
swissdelphicenter.ch

Making the Enter Key act like Tab (Delphi Tips)

2008-03-07T18:30:00.000-08:00

{ Delphi Tips
This code gives the key the same habbit as the key to
change focus between Controls.

}

// Form1.KeyPreview := True !

procedure TForm1.FormKeyPress(Sender: TObject; var Key: Char);
begin
if Key = #13 then
begin
Key := #0;
{ check if SHIFT - Key is pressed }
if GetKeyState(VK_Shift) and $8000 <> 0 then
PostMessage(Handle, WM_NEXTDLGCTL, 1, 0)
else
PostMessage(Handle, WM_NEXTDLGCTL, 0, 0);
end;
end;

swissdelphicenter.ch

know if the form is modal

2008-03-07T18:24:00.001-08:00

procedure TForm1.Button1Click(Sender: TObject);
begin
if (fsModal in FormState) then
ShowMessage('Form is modal.');
end;

swissdelphicenter.ch

Execute the Windows Explorer Find File Dialog Box

2008-03-07T18:20:00.000-08:00

The following example demonstrates using DDE to execute Explorer's find file dialog. The example opens the dialog in the Directory "C:\DelphiTips". ~~~~~~~~~~~~~~~~~~~~~~~~~
uses ddeman;
procedure TForm1.Button1Click(Sender: TObject) ;
begin
with TDDEClientConv.Create(Self) do begin
ConnectMode := ddeManual;
ServiceApplication := 'explorer.exe';
SetLink( 'Folders', 'AppProperties') ;
OpenLink;
ExecuteMacro
('[FindFolder(, C:\DelphiTips)]', False) ;
CloseLink;
Free;
end;
end;

About.com

Making a transparent form

2008-03-07T17:24:00.000-08:00

Add a Button (Button1) to a Delphi form (Form1)
procedure TForm1.FormCreate(Sender: TObject) ;
var
FullRgn, ClientRgn, ButtonRgn: THandle;
Margin, X, Y: Integer;
begin
Margin := (Width - ClientWidth) div 2;
FullRgn := CreateRectRgn(0, 0, Width, Height) ;
X := Margin;
Y := Height - ClientHeight - Margin;
ClientRgn := CreateRectRgn
(X, Y, X + ClientWidth, Y + ClientHeight) ;
CombineRgn(FullRgn, FullRgn, ClientRgn, RGN_DIFF) ;
X := X + Button1.Left;
Y := Y + Button1.Top;
ButtonRgn := CreateRectRgn
(X, Y, X + Button1.Width, Y + Button1.Height) ;
CombineRgn(FullRgn, FullRgn, ButtonRgn, RGN_OR) ;
SetWindowRgn(Handle, FullRgn, True) ;
end;

from: about.com