The initialization section is?optional. It begins with the reserved word initialization and continues until the beginning of the finalization section or, if there is no finalization section, until th...
Every delphi unit(pas file) you can have Initialization and Finalization section which will be executed during unit load and unlond respectivelyUnit2.pasunit Unit2;interfaceusesimplementationInitialization//Do your Initialization Steps HereFinalization//Do your Finalization Steps Hereend.
Hi Robert OnCalculate is event in Delphi it trigerrs when you are reading data from the database .NOTE : It trigerrs on reading each row Stupid Example :if you want to subtract two coolumns ...
Tform is the .dfm file associated with any delphi application. Tform acts as a parent and owner for the components placed on it. Every .dfm file has a .pas file associated with end.
This wizard helps you to build a Database Form with Ttabale, TDatasource and all the TDatabaseEdit Control without you droping each component.Cheers,Vijay
Unit is nothing but a text file that can be complied in a module of code.there are 2 different types of units Project Source unit and it can be saved with an extension of .DPRand Source code unit with an associated form and can be saved with an extension of .PAS
Every identifier (type, routine, variable, and so on) that you declare in the Interface portion of a unit becomes visible to any other unit of the program.
TActiveForm is the base class for a VCL Form exposed as an ActiveX control. TActiveForm represents a form that is created by a class factory (in Delphi) or using the Active Template Library (C++) and ...
It is a function in Delphi to find the Total memory status.It accepts TMemoryStatus variable as var parameter.It fills the variable entity with different memory status info like Total phisical...
File with .dpr extension is the project file. It comprises all the unit names used in the application along with their path in the hard disk (and the form name if the unit is associated with a .dfm fi...
Container is used to hold the components. It's the responsibility of the container to request the visible controls placed on it to paint themselves. The container is also responsible for creating and...
Components are commonly of two kindsVisual and Non-visualEx. VisualLabelsEdit boxesA visual component is one that helps make graphical building blocks.Ex. Non-visualTQueryTThread/Timer
TGraphicControl vs TWinControlThe TGraphicControl class provides the capability to have controls which are not windowed controls (they have no window handle). TWinControl is the base class from whic...
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