WS_VSCROLL := 0x200000
WS_EX_CLIENTEDGE := 0x200

Gui, New, +hwndhParent
Gui, New, +Parent%hParent% -Caption +ToolWindow
Gui, Color, Red
Gui, Add, Edit, x1 y1 w298 h198 -%WS_VSCROLL% -E%WS_EX_CLIENTEDGE%
Gui, Show, NA x30 y30 w300 h200
Gui, %hParent%: Show, w360 h260

GuiClose() {
   ExitApp
}