Is it possible to set the Window (x, y) Position in RAD Studio 10 c++?

Question

I'm developing an application and it looks as if my Form object doesn't have anything for me to specify its exact coordinates.

I have a label at the top acting as a titlebar, in c# I could use a combination of my mouse coordinates and window coordinates to make the window move with the mouse when the user clicks and drags. However, in c++ (along side RAD studio) there doesn't appear to be anything online I can use as reference to pull this off.

I've tried windows api with:

SetWindowPos(this->GetOwnerWindow(), HWND_TOPMOST, 5,5,5,5, SWP_NOMOVE | SWP_NOSIZE | SWP_SHOWWINDOW);

There's things like window position, but that only accepts integers or vars like "poScreenCenter".

Any insight on how this could be possible would be great.

Okay, that seems to work! If you leave yours as an answer I'll mark it correct — Piero Bird, Oct 22 '17 at 00:27

score 2 · Accepted Answer · answered Oct 22 '17 at 00:29

TForm (and all UI controls in general) have Left and Top (and Width and Height) properties.

You can use the Label's OnMouse(Down|Up) events to set/unset a bool, and then have the Label's OnMouseMove event reposition the Form if the bool is set.

A simpler and more efficient solution is to have the OnMouseDown event send an undocumented WM_COMMAND(SC_DRAGMOVE) message to the Form's HWND and let the OS handle the rest for you. See Moving a caption-less window by using a "drag area" (written for Delphi, but it applies to C++Builder too, since they use the same VCL framework).

I've put in my own version already, works perfectly. Thank you for the HQ answer — Piero Bird, Oct 22 '17 at 00:51

Is it possible to set the Window (x, y) Position in RAD Studio 10 c++?

1 Answers1