Set the position of a help window (Views: 300)
|
Problem/Question/Abstract: If you open a help file from your application, the help window always initializes at the same position. How do you change that, for instance to position a help window side by side with your form? Answer: You can use the Winhelp macro PositionWindow. procedure TForm1.Button1Click(Sender: TObject); var command: array[0..255] of Char; begin command := 'PW(0, 0, 512, 512, 1, "main")'; application.helpcommand(HELP_COMMAND, Longint(@command)); end; What it does: The code example above uses the HELP_COMMAND constant to execute a macro. The macro we use here is "PositionWindow" or - short - "PW". It defines the upper left corner (x1, y1) as (0,0) and the lower right corner (x2, y2) as (512,512). The following parameter is the integer constant for "SW_SHOWNORMAL". Winhelp does not recognize the string "sw_shownormal" in the macro string. The last parameter is the name of the window. One word about the coordinates: The position and size of a help window always relates to a virtual screen size of 1024 x 1024 pixel, regardless of the screen resolution. If you set the size to (0, 0, 1024, 512), the help window would cover exactly the upper half of the screen. |