Board index » delphi » Problems with data types.

KinOn

Delphi Developer
Wed, 18 Jun 1902 08:00:00 GMT

Problems with data types.

I'm a beginner of Pascal programming. When I want to run the following
program:

(******************************)
program:ExitWindowsExec
uses win31;
var
para:pchar;
begin
        ExitWindowsExec(ParamStr(1), para);
end.
(******************************)

An error message, type mismatch is displayed.
So, I'd like to know how to change the data type of ParamStr(1) which is
a sting to pchar. If any one has any suggestions, welcome to mail reply
to me.

 
Pedt Scrag

Delphi Developer
Wed, 18 Jun 1902 08:00:00 GMT

Re:Problems with data types.


In article <34BC57CB.1...@plink.cityu.edu.hk>, KinOn
<96008...@plink.cityu.edu.hk> writes

Quote
>I'm a beginner of Pascal programming. When I want to run the following
>program:

>(******************************)
>program:ExitWindowsExec
>uses win31;
>var
>para:pchar;
>begin
>       ExitWindowsExec(ParamStr(1), para);
>end.
>(******************************)

>An error message, type mismatch is displayed.
>So, I'd like to know how to change the data type of ParamStr(1) which is
>a sting to pchar. If any one has any suggestions, welcome to mail reply
>to me.

Use the strings unit and the StrPCopy function. This can convert your
string into a PChar.

Function StrPCopy (Dest : Pchar, Source : String) : Pchar;

And StrPas will convert from a PChar to a String.
--
Pedt Scragg                    <postmas...@pedt.demon.co.uk>

Never curse the Crocodile's mother before crossing the river

Other Threads

1. Problem with data type image on MS SQL

2. Problem with data type unknown error

3. datetime data type to smalldatetime data type conversion error

4. datetime data type to smalldatetime data type conversion error

5. changing real type data to word type

6. Money field type same as Currency data type??

7. Invalid Field Type for nchar and nvarchar data types

8. Invalid Field Type for nchar and nvarchar data types (I am using SQL Server 7.0)

9. IDE field types vs. IB6 data type

10. How can I convert VARCHAR type data to STRING Type