The following Delphi1 procedure executes a DOS program and waits until it finished. Parameter HWindow is the window handle of the calling application, typically you would pass Application.MainForm.Handle there.
The key function is GetModuleUsage to determine whether the DOS module is still in memory - this function is not available in in Delphi 2/3.
procedure ExecAndWait(HWindow:HWnd; ExecStr: PChar; CmdShow: word);
var
M : TMsg;
Erg : word;
ErgStr,
MsgStr : array[0..128] of char;
begin
Erg:=WinExec(ExecStr,CmdShow);
if Erg < 32 then
begin
str(erg, ergstr);
strcopy(msgstr,'Could not execute program. Error #: ');
strcat (msgstr, ergstr);
MessageBox(hwindow, ergstr, execstr, mb_ok or mb_iconstop);
end
else
begin { exec waits! }
ShowWindow(hwindow, sw_hide);
repeat
while PeekMessage(m,0,0,0,pm_remove) do
begin
if m.Message=wm_quit then
begin
PostQuitMessage(m.wparam);
exit;
end
else
begin
translatemessage(m);
dispatchmessage(m);
end;
end;
until GetModuleUsage(erg)=0;
ShowWindow(hwindow, sw_shownormal);
end;
end;