Delphi 7 - PNG Image isn't showing - image

Question

I am using Delphi 7 Pro. I have installed the PNG Component in my project, but whenever I load a PNG image into the Image1 component, the application starts but its main form is invisible. If I load a JPEG or a bitmap file, the form is shown. Here's the code I'm using in my form constructor:
procedure TFMain.FormCreate(Sender: TObject);
var
regn, tmpRegn, x, y: integer;
nullClr: TColor;
Settings: TInifile;
begin
FMain.Brush.Bitmap := Image1.Picture.Bitmap;
nullClr := Image1.Picture.Bitmap.Canvas.Pixels[0, 0];
regn := CreateRectRgn(0, 0, Image1.Picture.Graphic.Width, Image1.Picture.Graphic.Height);
for x := 1 to Image1.Picture.Graphic.Width do
for y := 1 to Image1.Picture.Graphic.Height do
if Image1.Picture.Bitmap.Canvas.Pixels[x - 1, y - 1] = nullClr then
begin
tmpRegn := CreateRectRgn(x - 1, y - 1, x, y);
CombineRgn(regn, regn, tmpRegn, RGN_DIFF);
DeleteObject(tmpRegn);
end;
SetWindowRgn(FMain.Handle, regn, True);
end;
Why is this happening ? What should I change so I can use PNG image in my Image1 ?
The whole code:
unit UnitMain;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, Gauges, Buttons, IniFiles, StdCtrls, OleCtrls, SHDocVw, ExtCtrls,
Wininet, ImgBtn, ComCtrls, ShlObj, ComObj, ActiveX, jpeg;
type
TFMain = class(TForm)
Gauge1: TGauge;
Gauge2: TGauge;
Image1: TImage;
Label1: TLabel;
Label2: TLabel;
Label3: TLabel;
ImgBtn1: TImgBtn;
ImgBtn2: TImgBtn;
ImgBtn3: TImgBtn;
ImgBtn4: TImgBtn;
Panel1: TPanel;
WebBrowser1: TWebBrowser;
Image2: TImage;
Image3: TImage;
Image4: TImage;
Label4: TLabel;
ImgBtn5: TImgBtn;
Timer1: TTimer;
procedure FormCreate(Sender: TObject);
procedure FormMouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
procedure FormMouseMove(Sender: TObject; Shift: TShiftState; X, Y: Integer);
procedure FormMouseUp(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
procedure ImgBtn4Click(Sender: TObject);
procedure ImgBtn3Click(Sender: TObject);
procedure ImgBtn2Click(Sender: TObject);
procedure ImgBtn1Click(Sender: TObject);
procedure FormClose(Sender: TObject; var Action: TCloseAction);
procedure ImgBtn5Click(Sender: TObject);
procedure WebBrowser1NavigateComplete2(Sender: TObject; const pDisp: IDispatch; var URL: OleVariant);
procedure Timer1Timer(Sender: TObject);
procedure UpdateRevision(Rev: string);
private
{ Private declarations }
public
Draging: Boolean;
X0, Y0: integer;
end;
var
FMain: TFMain;
USettings : TStrings;
implementation
uses
Frm2, GetFilesThr, Misc;
{$R *.dfm}
procedure TFmain.UpdateRevision(Rev: string);
var
Settings: TInifile;
begin
Settings := TInifile.Create(USettings[0] + '_settings.ini');
Settings.WriteString('main', 'AtRevision', Rev);
Settings.Free;
end;
function LoadSettings(): bool;
var
Settings: TInifile;
begin
Result := False;
USettings := TStringlist.Create;
USettings.Add(GetCurrentDir + '\');
if(FileExists(USettings[0] + '_settings.ini')) then
begin
Settings := TInifile.Create(USettings[0] + '_settings.ini');
USettings.Add(Settings.ReadString('main', 'NewsUrl', ''));
USettings.Add(Settings.ReadString('main', 'UpdatesUrl', ''));
USettings.Add(Settings.ReadString('main', 'LinkName', 'Lineage II'));
USettings.Add(Settings.ReadString('main', 'Installed', '0'));
USettings.Add(Settings.ReadString('main', 'CreateBackup', '0'));
USettings.Add(Settings.ReadString('main', 'AtRevision', '0'));
USettings.Add(Settings.ReadString('main', 'RunCustom', 'system\l2.exe'));
Settings.Free;
Result := True;
end
end;
// ρξηδΰες πλϋκ νΰ ρεα νΰ πΰαξχεμ ρςξλε
procedure CreateDesktopIcon(ilname, WorkDir, desc : string);
var
IObj: IUnknown;
SLink: IShellLink;
PFile: IPersistFile;
desk: string;
lnkpath: WideString;
begin
if(ilname <> '') then
begin
SetLength(desk, MAX_PATH + 1);
SHGetSpecialFolderPath(0, PAnsiChar(desk), CSIDL_DESKTOPDIRECTORY, False);
lnkpath:= PChar(desk) + '\' + ilname + '.lnk';
IObj := CreateComObject(CLSID_ShellLink);
SLink := IObj as IShellLink;
PFile := IObj as IPersistFile;
with SLink do
begin
SetDescription(PChar(desc));
SetPath(PChar(Application.ExeName));
SetWorkingDirectory(PAnsiChar(WorkDir));
end;
PFile.Save(PWChar(WideString(lnkpath)), FALSE);
end;
end;
procedure TFMain.FormCreate(Sender: TObject);
var
regn, tmpRegn, x, y: integer;
nullClr: TColor;
s_load: bool;
Settings: TInifile;
begin
s_load := LoadSettings();
if (s_load) then
begin
if (USettings[4] = '0') then
begin
Settings := TInifile.Create(USettings[0] + '_settings.ini');
Settings.WriteString('main','Installed', '1');
Settings.Free;
CreateDesktopIcon(USettings[3], USettings[0], 'Play Lineage II');
end;
end
else
begin
FMain.Timer1.Enabled := False;
ShowMessage('ERROR: _settings.ini Not Found !');
Application.Terminate; // .close ηδερό νε οπξιδες
end;
// Νΰβξδθμ κπΰρθβξρςό νΰ τξπμσ ...
FMain.brush.bitmap := Image1.picture.bitmap;
nullClr := image1.picture.Bitmap.Canvas.Pixels[0, 0];
regn := CreateRectRgn(0, 0, image1.picture.Graphic.Width, image1.picture.Graphic.Height);
for x := 1 to image1.picture.Graphic.Width do
for y := 1 to image1.picture.Graphic.Height do
if image1.picture.Bitmap.Canvas.Pixels[x - 1, y - 1] = nullClr then
begin
tmpRegn := CreateRectRgn(x - 1, y - 1, x, y);
CombineRgn(regn, regn, tmpRegn, RGN_DIFF);
DeleteObject(tmpRegn);
end;
SetWindowRgn(FMain.handle, regn, true);
end;
procedure TFMain.FormMouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
begin
Draging := true;
x0 := x;
y0 := y;
end;
procedure TFMain.FormMouseUp(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
begin
Draging := false;
end;
procedure TFMain.FormMouseMove(Sender: TObject; Shift: TShiftState; X, Y: Integer);
begin
if Draging then
begin
FMain.Left := FMain.Left + X - X0;
FMain.top := FMain.top + Y - Y0;
end;
end;
procedure TFMain.ImgBtn4Click(Sender: TObject);
begin
FMain.Close;
end;
procedure TFMain.ImgBtn3Click(Sender: TObject);
begin
FMain.Close;
end;
procedure TFMain.ImgBtn2Click(Sender: TObject);
var
WThread: GFilesThread;
begin
Label3.Caption := '';
WThread := GFilesThread.Create(True);
WThread.FreeOnTerminate := True;
WThread.UpdatesUrl := USettings[2];
WThread.ForceCheck := True;
WThread.CreateBackup := StrToInt(USettings[5]);
WThread.LocalRevision := StrToInt(USettings[6]);
WThread.Resume;
end;
procedure TFMain.ImgBtn1Click(Sender: TObject);
begin
RunApp(USettings[0] + Usettings[7]);
FMain.Close;
end;
procedure TFMain.FormClose(Sender: TObject; var Action: TCloseAction);
begin
USettings.Free;
end;
procedure TFMain.ImgBtn5Click(Sender: TObject);
begin
FMain.Enabled := False;
Form1.Show;
end;
procedure TFMain.WebBrowser1NavigateComplete2(Sender: TObject; const pDisp: IDispatch; var URL: OleVariant);
begin
FMain.Panel1.Visible := True;
FMain.Image2.Visible := True;
FMain.Image3.Visible := True;
FMain.Image4.Visible := True;
end;
procedure TFMain.Timer1Timer(Sender: TObject);
var
WThread: GFilesThread;
begin
FMain.Timer1.Enabled := False;
WebBrowser1.Navigate(USettings[1]);
Label3.Caption := '';
WThread := GFilesThread.Create(True);
WThread.FreeOnTerminate := True;
WThread.UpdatesUrl := USettings[2];
WThread.ForceCheck := False;
WThread.CreateBackup := StrToInt(USettings[5]);
WThread.LocalRevision := StrToInt(USettings[6]);
WThread.Resume;
end;
end.