Difference between revisions of "PChar"
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Jump to navigationJump to searchm (Fixed syntax highlighting; removed categories included in template) |
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begin | begin | ||
s := 'Test'; | s := 'Test'; | ||
− | Application.MessageBox( PChar(s | + | Application.MessageBox( PChar(s),'Title', MB_OK ); |
end; | end; | ||
</syntaxhighlight> | </syntaxhighlight> |
Revision as of 21:51, 31 March 2020
Back to data types.
A PChar is Data type and a Pointer to a null-terminated string. The most important application of a PChar is interaction with system libraries like dll's.
Messagebox:
var
s: String;
begin
s := 'Test';
Application.MessageBox( PChar(s),'Title', MB_OK );
end;
Declaration:
var
p: PChar;
Valid assignments:
p := 'This is a null-terminated string.';
p := IntToStr(45);
Invalid assignments:
p := 45;
The integer value is not casted to a PChar as might be expected.