var
ErrorCode: Integer;
IsRunning: Integer;
// 安装时判断客户端是否正在运行
function InitializeSetup(): Boolean;
begin
Result :=true; //安装程序继续
IsRunning:=FindWindowByWindowName(‘E家人客户端‘);
while IsRunning<>0 do
begin
if Msgbox(‘安装程序检测到客户端正在运行。‘ #13#13 ‘您必须先关闭它然后单击“是”继续安装，或按“否”退出！‘, mbConfirmation, MB_YESNO) = idNO then
begin
Result :=false; //安装程序退出
IsRunning :=0;
end else begin
Result :=true; //安装程序继续
IsRunning:=FindWindowByWindowName(‘E家人客户端‘);
end;
end;
end;
// 卸载时判断客户端是否正在运行
function InitializeUninstall(): Boolean;
begin
Result :=true; //安装程序继续
IsRunning:=FindWindowByWindowName(‘E家人客户端‘);
while IsRunning<>0 do
begin
if Msgbox(‘安装程序检测到客户端正在运行。‘ #13#13 ‘您必须先关闭它然后单击“是”继续安装，或按“否”退出！‘, mbConfirmation, MB_YESNO) = idNO then
begin
Result :=false; //安装程序退出
IsRunning :=0;
end else begin
Result :=true; //安装程序继续
IsRunning:=FindWindowByWindowName(‘E家人客户端‘);
end;
end;
end;
procedure CurUninstallStepChanged(CurUninstallStep: TUninstallStep);
begin
case CurUninstallStep of
usUninstall:
begin // 开始卸载
end;
usPostUninstall:
begin // 卸载完成
// MsgBox(‘CurUninstallStepChanged:‘ #13#13 ‘Uninstall just finished.‘, mbInformation, MB_OK);
// ...insert code to perform post-uninstall tasks here...
ShellExec(‘open‘, ‘http://domain‘, ‘‘, ‘‘, SW_SHOWNORMAL, ewNoWait, ErrorCode);
end;
end;
end;
原文：http://www.cnblogs.com/zhangzhifeng/p/5839101.html