API in Excel
 

Can anybody give an example or link of using GDI in Excel?
Is it possible to plot a function on a form surface for example without
Excel charts, just using LineTo, SetPixel etc.?

Thank you in advance.

Mike

API in Excel
 

I have found a solution using VB6 examples and news archive:
Dim hDC As Long
Dim DummyPt As PointAPI
hDC = GetDC(0)
Call SetPixelV(hDC, 100, 100, vbRed)
Call MoveToEx(hDC, 5, 15, DummyPt)
Call LineTo(hDC, 25, 15)
ReleaseDC 0, hDC
But instead a form it is plotting on Excel window itself (or on VBA editor).

Can anybody help? What parameter should I pass to GetDC() instead of 0?

Thank you in advance.

Mike.

"Mike510" ÓÏÏÂÝÉÌ/ÓÏÏÂÝÉÌÁ × ÎÏ×ÏÓÔÑÈ ÓÌÅÄÕÀÝÅÅ:
...
Can anybody give an example or link of using GDI in Excel?
Is it possible to plot a function on a form surface for example without
Excel charts, just using LineTo, SetPixel etc.?

Thank you in advance.

Mike

API in Excel
 

Hi Mike510,

I have found a solution using VB6 examples and news archive:
Dim hDC As Long
Dim DummyPt As PointAPI
hDC = GetDC(0)
Call SetPixelV(hDC, 100, 100, vbRed)
Call MoveToEx(hDC, 5, 15, DummyPt)
Call LineTo(hDC, 25, 15)
ReleaseDC 0, hDC
But instead a form it is plotting on Excel window itself (or on VBA editor).

Can anybody help? What parameter should I pass to GetDC() instead of 0?

The parameter to GetDC (and ReleaseDC) should be the window handle of the
form, found using the FindWindow(vbNullString,Me.Caption) API call.

Regards

Stephen Bullen
Microsoft MVP - Excel
www.oaltd.co.uk

API in Excel
 

Thank you very much for your help, Mr. Bullen.
Before I have read your post, I tried GetActiveWindow(). It worked too.
Should I delete hDC after releasing it or it is not necessary?


"Stephen Bullen" wrote in message
...
Hi Mike510,

I have found a solution using VB6 examples and news archive:
Dim hDC As Long
Dim DummyPt As PointAPI
hDC = GetDC(0)
Call SetPixelV(hDC, 100, 100, vbRed)
Call MoveToEx(hDC, 5, 15, DummyPt)
Call LineTo(hDC, 25, 15)
ReleaseDC 0, hDC
But instead a form it is plotting on Excel window itself (or on VBA
editor).

Can anybody help? What parameter should I pass to GetDC() instead of 0?

The parameter to GetDC (and ReleaseDC) should be the window handle of the
form, found using the FindWindow(vbNullString,Me.Caption) API call.

Regards

Stephen Bullen
Microsoft MVP - Excel
www.oaltd.co.uk

API in Excel
 

Hi Mike510,

Should I delete hDC after releasing it or it is not necessary?

No, once released, that's OK.

Regards

Stephen Bullen
Microsoft MVP - Excel
www.oaltd.co.uk