请之指教以下语句错误(50分)

J

jony1

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GUEST, unregistred user!

• 2000-09-19

• #1

var aa:string;
begin
aa:='001';
application.messagebox(aa+'该匙牌未开，请另选！','提示框',
mb_ok);
end;

错误显示'[Error] timeUnit.pas(55): Incompatible types: 'String' and 'PChar'
请指点一二，

 

S

snowtree

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GUEST, unregistred user!

• 2000-09-19

• #2

MessageBox是从winapi过来的，
它的参数必须是Pchar类型！

 

S

snowtree

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GUEST, unregistred user!

• 2000-09-19

• #3

指的是Caption和Text必须是PChar,
如果是String则须转换，PChar(a)（a是string)|则可！

 

J

jacer

Unregistered / Unconfirmed

GUEST, unregistred user!

• 2000-09-19

• #4

application.messagebox(PChar(aa+'该匙牌未开，请另选！'),PChar('提示框'),mb_ok);

 

C

Chenlili

Unregistered / Unconfirmed

GUEST, unregistred user!

• 2000-09-19

• #5

或者申明一个char数组：

 

J

jony1

Unregistered / Unconfirmed

GUEST, unregistred user!

• 2000-09-19

• #6

接受答案了.