PChar defines a pointer to a memory location that contains WideChar values (including the #0 character). In Delphi, one can obtain a PChar value from a string or a WideString, allowing seamless integration with C or C++ applications that expect null-terminated Unicode strings.

What is PChar?

PChar is defined as a pointer to a Char type, but allows additional operations. The PChar type can be understood best as the Pascal equivalent of a C-style null-terminated string, i. e. a variable of type PChar is a pointer that points to an array of type Char, which is ended by a null-character (#0).

What does Chr do in Delphi?

Delphi Basics : chr command. The chr function converts an IntValue integer into either an AnsiChar or WideChar as appropriate. The ansi character set includes control characters such as Chr(27) meaning escape. Note that ^A is equivalent to Char(1).

What does #9 do in Delphi?

#9 tab display issue is message dialogs In latest Delphi versions #9 tabs does not work properly with message dialogs because Windows ignores tabs on buttons and dialogs.

What does #13 do in Delphi?

#13 means an ordinal 13, or ascii for carriage return. Chr(13) is the same idea, CHR() changes the number to an ordinal type. Note that there are no semi-colon’s in this particular facet of Delphi, and “=” is used rather than “:=”. The text for each line is enclosed in single quotes.

What does #13 Do Delphi?

The “#13#10” part represents a carriage return + line feed combination. The “#13” is the ASCII equivalent of the CR (carriage return) value; #10 represents LF (line feed).

What does #9 mean in Delphi?

The “#13” is the ASCII equivalent of the CR (carriage return) value; #10 represents LF (line feed). Two more interesting control characters include: #0 — NULL character. #9 — (horizontal) TAB.

What does #13 mean in Delphi?

carriage return
The “#13#10” part represents a carriage return + line feed combination. The “#13” is the ASCII equivalent of the CR (carriage return) value; #10 represents LF (line feed). Two more interesting control characters include: #0 — NULL character.

What is the use of pointchar in Delphi?

Pchar is a datatype (pointer of characters) that holds array of characters or single character. It is null terminated string like C. It starts from 0 index. In Delphi it is mostly used for Windows API function calls. Since the array has no length indicator, Delphi uses

What is a PChar in C++?

The PChar type is a pointer to an Char value. It can also be used to point to characters within a string, as in the example code. As with other pointers, integer arithmetic, such as Inc and Dec can be performed on a PChar variable, also shown in the example.

What is the difference between Char Char and string in Delphi?

Char is a data type that holds only one character as value. Ansi Characters are used to store single byte ansi characters. Unicode String is a data type this kind of variables holds sequence of characters as value. In old version String = Ansistring. But in new versions from Delphi 2010 it is Unicodestring / WideString.

Is it possible to copy text from a PChar to a string?

But it isn’t! A PChar has no automatic storage, like the convenient Delphi type string. If you copy text to a PChar-“string”, you must always make sure that the PChar actually points to a valid array, and that the array is large enough to hold the text.