Question

我写了

function CreateProcess(
            lpApplicationName:String;
            lpCommandLine:String;
            lpProcessAttributes:IntPtr;
            lpThreadAttributes:IntPtr;
            bInheritHandles:Boolean;
            dwCreationFlags:Int32;
            lpEnvironment:IntPtr;
            lpCurrentDirectory:IntPtr;
            lpStartupInfo:STARTUPINFO;
            lpProcessInformation:ProcessInfo):Boolean;
         external 'kernel32.dll';

但VStudio表示“分号”预计 - 在外部之后和“”结束“预期”在'kernel32.dll'之后; 你能帮忙我加载和调用一个函数吗？

Answer 1

为什么不使用.NET Process Class ..在这种情况下使用interop没有多大意义，因为你已经在使用Delphi Prism ..

http://msdn.microsoft.com/en-us/library/system.diagnostics.process.aspx

Answer 2

@Ilya，您使用错误的语法来调用外部函数。您需要使用DllImport关键字来使Windows互操作。

你必须将你的功能重写为

[DllImport("kernel32.dll")]
class function CreateProcess(
            lpApplicationName:String;
            lpCommandLine:String;
            lpProcessAttributes:IntPtr;
            lpThreadAttributes:IntPtr;
            bInheritHandles:Boolean;
            dwCreationFlags:Int32;
            lpEnvironment:IntPtr;
            lpCurrentDirectory:IntPtr;
            lpStartupInfo:STARTUPINFO;
            lpProcessInformation:ProcessInfo):Boolean; external;

检查此工作样本

namespace ConsoleApplication20;

interface
uses
    System.Diagnostics,
    System.Runtime.InteropServices;


type
PROCESS_INFORMATION =record
    hProcess    : IntPtr;
    hThread     : IntPtr;
    dwProcessId : UInt32;
    dwThreadId  : UInt32;
end;



STARTUPINFO =record
     cb       : UInt32;
    lpReserved: String;
    lpDesktop : String;
    lpTitle   : String;
    dwX       : UInt32;
    dwY       : UInt32;
    dwXSize   : UInt32;
    dYSize    : UInt32;
    dwXCountChars   : UInt32;
    dwYCountChars   : UInt32;
    dwFillAttribute : UInt32;
    dwFlags         : UInt32;
    wShowWindow : ShortInt;
    cbReserved2 : ShortInt;
    lpReserved2 : IntPtr;
    hStdInput   : IntPtr;
    hStdOutput  : IntPtr;
    hStdError   : IntPtr;
end;

  ConsoleApp = class
  private
    [DllImport("kernel32.dll")]
    class method CreateProcess( lpApplicationName: string;  lpCommandLine:string;  lpProcessAttributes:IntPtr; lpThreadAttributes:IntPtr;
                        bInheritHandles:Boolean;dwCreationFlags: UInt32;  lpEnvironment:IntPtr;
                        lpCurrentDirectory:string;var lpStartupInfo:STARTUPINFO;out lpProcessInformation:PROCESS_INFORMATION) : boolean; external;
  public
    class method Main;
  end;

implementation

class method ConsoleApp.Main;
var
lpStartupInfo        : STARTUPINFO;
lpProcessInformation : PROCESS_INFORMATION;
begin
        lpStartupInfo := new STARTUPINFO();
        lpProcessInformation := new PROCESS_INFORMATION();
        Console.WriteLine('Creating Process');
        CreateProcess('C:\WINDOWS\SYSTEM32\notepad.exe', nil, IntPtr.Zero, IntPtr.Zero, false, 0, IntPtr.Zero, nil, var lpStartupInfo, out lpProcessInformation);
        Console.ReadLine();
end;

end.

检查这些mmore info

的链接

如何在Delphi Prism中调用函数CreateProcess？

2 个答案: