How much of pakistan was part of Afghanistan?

This is ridiculous! People's never get defined by the place of their birth...but by their race, culture and blood. More over Pakistan is not continuity of Afghan kingdom...but a new entity upholding religion as base for their identity! In political term Pakistan is successor of British raj.

Only Peshawar was under rule of Sikh while the urban Pashton populated area were directly under Afghan. Durand treaty explains this�for if Sikh had ruled these area then British would have not need for a treaty�  

Articles  of Durand treaty. 

http://www.khyber.org/pashtohistory/treaties/durandagreement.shtml

1. The British Government thus agrees to His Highness the Amir retaining Asmar and the valley above it, as far as Chanak. His Highness agrees, on the other hand, that he will at no time exercise interference in Swat, Bajaur, or Chitral, including the Arnawai or Bashgal valley. The British Government also agrees to leave to His Highness the Birmal tract as shown in the detailed map already given to his Highness, who relinquishes his claim to the rest of the Waziri country and Dawar. His Highness also relinquishes his claim to Chageh.
2. The frontier line will hereafter be laid down in detail and demarcated, wherever this may be practicable and desirable, by joint British and Afghan commissioners, whose object will be to arrive by mutual understanding at a boundary which shall adhere with the greatest possible exactness to the line shown in the map attached to this agreement, having due regard to the existing local rights of villages adjoining the frontier.
    
3. With reference to the question of Chaman, the Amir withdraws his objection to the new British cantonment and concedes to the British Governmeni the rights purchased by him in the Sirkai Tilerai water. At this part of the frontier the line will be drawn as follows:
   
   From the crest of the Khwaja Amran range near the Psha Kotal, which remains in British territory, the line will run in such a direction as to leave Murgha Chaman and the Sharobo spring to Afghanistan, and to pass half-way between the New Chaman Fort and the Afghan outpost known locally as Lashkar Dand. The line will then pass half-way between the railway station and the hill known as the Mian Baldak, and, turning south-wards, will rejoin the Khwaja Amran range, leaving the Gwasha Post in British territory, and the road to Shorawak to the west and south of Gwasha in Afghanistan. The British Government will not exercise any interference within half a mile of the road

This is ridiculous! People's never get defined by the place of their birth...but by their race, culture and blood. More over Pakistan is not continuity of Afghan kingdom...but a new entity upholding religion as base for their identity! In political term Pakistan is successor of British raj.