我在StackOverflow上看过一些帖子,但没有一个对我有用.这是我用来在我的表单上显示标准计算器窗口的代码：
procedure TForm1.Button1Click(Sender: TObject);
var
Tmp: Cardinal;
R: TRect;
begin
CalcWindow := FindWindow(nil,'Calculator');
if (CalcWindow <> 0) then
begin
GetWindowThreadProcessID(CalcWindow,CalcProcessID);
Tmp := GetWindowLong(CalcWindow,GWL_STYLE);
Tmp := (Tmp and not WS_POPUP) or WS_CHILD;
SetWindowLong(CalcWindow,GWL_STYLE,Tmp);
GetWindowRect(CalcWindow,R);
SetForegroundWindow(CalcWindow);
Windows.SetParent(CalcWindow,Panel1.Handle);
SetWindowPos(CalcWindow,HWND_TOPMOST,SWP_NOSIZE or SWP_FRAMECHANGED);
AttachThreadInput(GetCurrentThreadID(),CalcWindow,True);
end;
end;
它确实在我的窗体上显示窗口,但玻璃边框有时丢失(特别是当我移动窗体时),很难将焦点恢复到嵌入窗口(我需要多次单击).
可能是什么导致了这个？另外,您是否看到使用此方法可能遇到的任何潜在问题？
感谢您的时间.
解决方法
试试这个代码.我从一个较旧的源代码中获取了它.您将失去玻璃框架,但主菜单是可见的,我没有注意到将焦点设置回嵌入式应用程序时出现任何问题.您应该可以使用SetForegroundWindow()API函数执行此操作.每当您移动容器表单时,嵌入式应用程序都会失去焦点,因此您需要再次调用SetForegroundWindow来恢复焦点：
procedure ShowAppEmbedded(WindowHandle: THandle; Container: TWinControl);
var
WindowStyle : Integer;
FAppThreadID: Cardinal;
begin
/// Set running app window styles.
WindowStyle := GetWindowLong(WindowHandle,GWL_STYLE);
WindowStyle := WindowStyle
- WS_CAPTION
- WS_BORDER
- WS_OVERLAPPED
- WS_THICKFRAME;
SetWindowLong(WindowHandle,WindowStyle);
/// Attach container app input thread to the running app input thread,so that
/// the running app receives user input.
FAppThreadID := GetWindowThreadProcessId(WindowHandle,nil);
AttachThreadInput(GetCurrentThreadId,FAppThreadID,True);
/// Changing parent of the running app to our provided container control
Windows.SetParent(WindowHandle,Container.Handle);
SendMessage(Container.Handle,WM_UPDATEUISTATE,UIS_INITIALIZE,0);
UpdateWindow(WindowHandle);
/// This prevents the parent control to redraw on the area of its child windows (the running app)
SetWindowLong(Container.Handle,GetWindowLong(Container.Handle,GWL_STYLE) or WS_CLIPCHILDREN);
/// Make the running app to fill all the client area of the container
SetWindowPos(WindowHandle,Container.ClientWidth,Container.ClientHeight,SWP_NOZORDER);
SetForegroundWindow(WindowHandle);
end;
你可以这样称呼它：
ShowAppEmbedded(FindWindow(nil,'Calculator'),Panel1);