Title: The GetFolder function
Question: How to use the windows shell api to call the windows
dialog for choosing a folder.
Answer:
For some reason there is no metasymbol in the component toolbar
of delphi to call the standard windows dialog for choosing a
folder. Here is a function for this:
uses
ShlObj;
...
function GetFolder(aRoot: integer; aCaption :string): string;
var
pPrograms,pBrowse: PItemIDList;
hBrowseInfo: TBROWSEINFO;
hPChar: PChar;
begin
if (not SUCCEEDED(SHGetSpecialFolderLocation(Getactivewindow, aRoot,
pPrograms))) then
EXIT;
hPChar := StrAlloc(max_path);
with hBrowseInfo do
begin
hwndOwner := Getactivewindow;
pidlRoot := pPrograms;
pszDisplayName := hPChar;
lpszTitle := pChar(aCaption);
ulFlags := BIF_RETURNONLYFSDIRS;
lpfn := nil;
lParam := 0;
end;
pBrowse := SHBrowseForFolder(hBrowseInfo);
if (pBrowse nil) then
if (SHGetPathFromIDList(pBrowse, hPChar)) then Result:= hPChar;
StrDispose(hPChar);
end;