我需要帮助将LPARAM类型转换为Structure。例如,在C ++中,我们有:

struct MyStructure
{
   int data01;
   int data02;
};

BOOL CALLBACK CallbackProc(int number, LPARAM param)
{
   MyStructure *myStruct = (MyStructure *) param;
}


在Delphi中,我尝试了此操作,但是编译器在高亮行中给出了注释不兼容类型的错误:

type
  TMyStructure = record
    data01: Integer;
    data02: Integer;
  end;

PMyStructure = ^TMyStructure;

function CallbackProc(number: Integer; param: LPARAM): BOOL; stdcall;
var
  myStruct: TMyStructure;
begin
  myStruct := param; // How stays here?
end;

最佳答案

C ++代码将LPARAM强制转换为指向结构的指针。在Delphi中,将如下所示:

type
  TMyStructure = record
    data01: Integer;
    data02: Integer;
  end;
  PMyStructure = ^TMyStructure;

function CallbackProc(number: Integer; param: LPARAM): BOOL; stdcall;
var
  myStruct: PMyStructure;
begin
  myStruct := PMyStructure(param);
end;

关于delphi - 如何将LPARAM转换为Delphi中的结构?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/55559333/

10-10 06:36