PostMessage Madness (OpenInsight 32-Bit) [Revelation On-Line Wiki]

OpenInsight 32-Bit, Don Muskopf, Richard Hunt

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PostMessage Madness (OpenInsight 32-Bit)

At 12 OCT 2005 10:47:29AM Don Muskopf wrote:

I am trying to place a context menu at the bottom left corner of a pushbutton control (i.e. left justified at the bottom of the button). I use the following code to call a context menu from the pushbutton.

Ctrl=@Window:".BUTTON_SORT"

equ WM_RBUTTONDOWN$ To 516

Handle=Get_Property(Ctrl,"HANDLE")

ControlSize=Get_Property(Ctrl, "SIZE")

xPos=ControlSize ; x coordinate of the control

yPos=ControlSize

wControl=ControlSize

hControl=ControlSize

lParam=(hControl * 65535 ) + xPos

PostMessage(Handle,WM_RBUTTONDOWN$,0,lParam)

The context menu is placed at the correct vertical position where I want it (immediately below the button), but there seems to be no rhyme or reason as to how the x coordinate works in PostMessage.

If xPos=306, the context menu is placed at xCoordinate 588. If xPos=618, the context menu is placed at xCoordinate 1122. And so on

Is there a method to this madness?

Thanks.

At 12 OCT 2005 12:30PM Richard Hunt wrote:

I have no problems with positioning right click menus on an Edittable. I do know that the HPARAM is calculated as follows…

HPARAM=FROM_THE_LEFT_BORDER_OF_CONTROL + (FROM_THE_TOP_BORDER_OF_CONTROL * 65536)

At 12 OCT 2005 01:36PM Don Muskopf wrote:

Hi Richard,

I thought I was already doing that with:

lParam=(hControl * 65535 ) + xPos

where hControl is the height of the control. Are there any issues with PostMessage and 7.1.1?

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