herr_apfelschnitt
asked on
Additional button on ShBrowseForFolder dialog
I managed to place an extra button ('Create new directory') on the ShBrowseForFolder dialog, but when it doesn't seem to do anything if you click it. The event handler procedure in the parent form isn't called.
Could this have anything to do with the fact that ShBrowseForFolder pauses the execution of the calling program? If not, why doesn't this work? (and of course, how do I fix it?)
Could this have anything to do with the fact that ShBrowseForFolder pauses the execution of the calling program? If not, why doesn't this work? (and of course, how do I fix it?)
ASKER
Hi Cesario
I tried that but it won't compile: it says BIF_USENEWUI is undeclared. (btw i'm using Delphi 3 if that has anything to do with it). ShellAPI and ShlObj are both in the 'uses' clause, and BIF_RETURNONLYFSDIRS isn't a problem.
Maybe you can just give me the value it stands for?
Thx,
herr_apfelschnitt
I tried that but it won't compile: it says BIF_USENEWUI is undeclared. (btw i'm using Delphi 3 if that has anything to do with it). ShellAPI and ShlObj are both in the 'uses' clause, and BIF_RETURNONLYFSDIRS isn't a problem.
Maybe you can just give me the value it stands for?
Thx,
herr_apfelschnitt
ASKER
Hi Cesario
I tried that but it won't compile: it says BIF_USENEWUI is undeclared. (btw i'm using Delphi 3 if that has anything to do with it). ShellAPI and ShlObj are both in the 'uses' clause, and BIF_RETURNONLYFSDIRS isn't a problem.
Maybe you can just give me the value it stands for?
Thx,
herr_apfelschnitt
I tried that but it won't compile: it says BIF_USENEWUI is undeclared. (btw i'm using Delphi 3 if that has anything to do with it). ShellAPI and ShlObj are both in the 'uses' clause, and BIF_RETURNONLYFSDIRS isn't a problem.
Maybe you can just give me the value it stands for?
Thx,
herr_apfelschnitt
const
BIF_USENEWUI = 28;
BIF_USENEWUI = 28;
ASKER
Sorry, this doesn't solve anything. The dialog just looks a bit different, but the button keeps ignoring clicks...
ASKER CERTIFIED SOLUTION
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Hi everyone,
Cynna provided the answer in a second post from herr_apfelschnitt here:
https://www.experts-exchange.com/questions/20319670/Don't-forget-about-me.html
and the answer was:
--begin--
Accepted Answer
From: Cynna
Date: 07/04/2002 05:43PM PST
herr_apfelschnitt,
You are creating a TButton on a non-VCL control, and trying to
use its OnClick event. Generally, using CreateParented() is a
bad idea for anything other then ActiveX.
You should tackle your problem by directly creating button
on foreign window through raw API functions. Message should
be handled by your own window procedure.
Since you offered 300 points, I took time to code your
problem ;-), so you could just Copy/Paste it, it should work
right away...
const
BUTTON_ID = 255;
var
browseNewDirBtn : Hwnd; // <-- not TButton any more !
// (....)
function browseNewDirBtn_Clicked(HW indow: HWND; Msg: UINT;
wParam: WPARAM; lParam: LPARAM): LRESULT; stdcall;
begin
Result:=0;
if (Msg=WM_COMMAND) and (Lo(wParam)=BUTTON_ID) then begin
Form1.Caption:='Button Clicked!';
ShowMessage('Look at the form caption...');
// -------------------------- ----
// ...do your stuff here....
// -------------------------- ----
end
else Result:=DefDlgProc(HWindow ,Msg,wPara m,lParam);
end;
function BrowseCallBackProc(H: Hwnd; UMsg: UINT; lParam: lParam; lpData: lParam): Integer; stdcall;
begin
case UMsg of
BFFM_INITIALIZED: begin // This is only change - no VCL button!
browseNewDirBtn := CreateWindow('BUTTON', 'Into new dir...',
WS_CHILD or WS_VISIBLE,
10, 269, 100, 30,
H, BUTTON_ID, HInstance, nil);
SendMessage(browseNewDirBt n, WM_SETFONT,
WPARAM(Form1.Font.Handle), 1);
SetWindowLong(H,GWL_WNDPRO C,Longint( @browseNew DirBtn_Cli cked));
end;
BFFM_SELCHANGED: begin
if (lpData <> 0) then
begin
ShGetPathFromIDList(PItemI DList(lpDa ta), currSelectedFolder);
end else
currSelectedFolder := '';
end;
end;
Result := 0;
end;
--end--
darinw
Former EE CS Guy
Cynna provided the answer in a second post from herr_apfelschnitt here:
https://www.experts-exchange.com/questions/20319670/Don't-forget-about-me.html
and the answer was:
--begin--
Accepted Answer
From: Cynna
Date: 07/04/2002 05:43PM PST
herr_apfelschnitt,
You are creating a TButton on a non-VCL control, and trying to
use its OnClick event. Generally, using CreateParented() is a
bad idea for anything other then ActiveX.
You should tackle your problem by directly creating button
on foreign window through raw API functions. Message should
be handled by your own window procedure.
Since you offered 300 points, I took time to code your
problem ;-), so you could just Copy/Paste it, it should work
right away...
const
BUTTON_ID = 255;
var
browseNewDirBtn : Hwnd; // <-- not TButton any more !
// (....)
function browseNewDirBtn_Clicked(HW
wParam: WPARAM; lParam: LPARAM): LRESULT; stdcall;
begin
Result:=0;
if (Msg=WM_COMMAND) and (Lo(wParam)=BUTTON_ID) then begin
Form1.Caption:='Button Clicked!';
ShowMessage('Look at the form caption...');
// --------------------------
// ...do your stuff here....
// --------------------------
end
else Result:=DefDlgProc(HWindow
end;
function BrowseCallBackProc(H: Hwnd; UMsg: UINT; lParam: lParam; lpData: lParam): Integer; stdcall;
begin
case UMsg of
BFFM_INITIALIZED: begin // This is only change - no VCL button!
browseNewDirBtn := CreateWindow('BUTTON', 'Into new dir...',
WS_CHILD or WS_VISIBLE,
10, 269, 100, 30,
H, BUTTON_ID, HInstance, nil);
SendMessage(browseNewDirBt
WPARAM(Form1.Font.Handle),
SetWindowLong(H,GWL_WNDPRO
end;
BFFM_SELCHANGED: begin
if (lpData <> 0) then
begin
ShGetPathFromIDList(PItemI
end else
currSelectedFolder := '';
end;
end;
Result := 0;
end;
--end--
darinw
Former EE CS Guy
The April MSDN implies all you need in addition to the standard use of SHBrowseForFolder is this:
bi.ulFlags = BIF_USENEWUI;
Best Regards
Cesario