wpLicese Page检查ScrollBars位置是否最大(Inno Setup)

本文介绍了wpLicese Page检查ScrollBars位置是否最大(Inno Setup)的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

是否可以在Inno Setup的wpLicense页面中检查ScrollBar的位置而无需编写自定义备忘录页面?

Is it possible to check the position of ScrollBar in wpLicense Page in Inno Setup without having to write custom memo page?

例如

procedure CurPageChanged(CurPageID: Integer);
 begin

     if CurPageID = wpLicense then
        WizardForm.LicenseAcceptedRadio.Enabled := False;
        WizardForm.LicenseNotAcceptedRadio.Enabled := False;

     if ScrollBar.Position := ScrollBar.Max then
        WizardForm.LicenseAcceptedRadio.Enabled := True;
        WizardForm.LicenseNotAcceptedRadio.Enabled := True;
  end;

推荐答案

没有直接访问这些滚动条的方法，但是您可以使用 GetScrollInfo 的功能如下:

There is no direct access to those scroll bars, however you can use the GetScrollInfo function this way:

[code]
const
  SB_VERT = 1;
  SIF_RANGE = 1;
  SIF_POS = 4;
  SIF_PAGE = 2;

type
  TScrollInfo = record
    cbSize: UINT;
    fMask: UINT;
    nMin: Integer;
    nMax: Integer;
    nPage: UINT;
    nPos: Integer;
    nTrackPos: Integer;
  end;

function GetScrollInfo(hWnd: HWND; BarFlag: Integer; 
  var ScrollInfo: TScrollInfo): BOOL;
  external '[email protected] stdcall';

procedure CurPageChanged(CurPageID: Integer);
var
  ScrollInfo: TScrollInfo;
begin
  if CurPageID = wpLicense then
  begin
    ScrollInfo.cbSize := SizeOf(ScrollInfo);
    ScrollInfo.fMask := SIF_RANGE or SIF_POS or SIF_PAGE;
    if GetScrollInfo(WizardForm.LicenseMemo.Handle, SB_VERT, ScrollInfo) then
      if ScrollInfo.nPos = ScrollInfo.nMax - ScrollInfo.nPage then
        MsgBox('You are at the end of the license!', mbInformation, MB_OK);
  end;
end;

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