Chau Chee Yang Technical Blog

We may use windows GDI function AlphaBlend to draw translucent graphic. The following example extract a portion of desktop image and draw t...

Using Delphi command lines compiler DCC32 to compile programs allow us to set some switches to get various kind of output. The most common ...

Windows has some special folders like My Documents, SendTo, Desktop or Favorites. The location of this folders are keep in the following reg...

We may consume the Google API to post entry of event kind. Those entry are mostly encoded in XML content. It is a common habit for windows...

Indy VCL 10 distribution supports SSL via OpenSSL but it didn't bundle the DLL library. We have to download the Win32 OpenDDL from her...

We may make a form without borders to show some additional information using some popup windows. However, a borderless form will no longer ...

We usually use mouse to drag the windows form title bar to move the window on our desktop. There is a new way to move the form by just drag...

TListBox is a simple visual component that always use for display a list of items but it has some nice features that we always neglected. U...

When we use /usr/sbin/useradd to create a user, it's home directory may contain some default files or folders (it is hidden usually). H...

If we want to change background color of a form: we usually do like this: Form1.Color := clYellow; However, if a Form's FormStyle i...

There is only one way to prevent creation of ~BPL in Delphi 2007 IDE: patch delphicoreide100.bpl in C:\Program Files\CodeGear\RAD Studio\5.0...

Due to I/O redirector problem in GBAK.EXE ( http://tech.groups.yahoo.com/group/firebird-support/message/90995 ), I download Firebird source...

We may easily embed a Delphi GUI control into another container control like TForm or TPanel: var F: TForm; B: TButton; begin F := TForm....

Using Local Protocol to connect to Firebird database no longer works in Windows Vista when we install firebird server using setup file's...

Typical DOS application that may perform great function are GREP, MORE, SORT. These functions chain together via command redirection operat...

Here is the code to scroll TMemo control to bottom at runtime: var M: TWMVScroll; begin M.Msg := WM_VSCROLL; M.ScrollCode := SB_BOTTOM; ...

I use GBAK.EXE to perform backup and restore operation of Firebird database in my GUI application design. The reason I use GBAK instead of...

We may use GetOptionalParam and SetOptionalParam methods to access the optional parameters in TClientDataSet instance. However, if we do n...

We may seldom need to deal with Windows API when using Delphi VCL to develop a Win32 application. The most common information we may want t...

Although using SendMessage and PostMessage isn't a good practice in OO design. However, I do need it in some situation. All the while ...