Image Stretch Or Reduced To Fit Inside Button?

i'm creating 64 button dynamically during run time. and from database i'm getting the description, font color, back color and picture path. and if the picture path is not nothing, then i need to display that picture in that button. if picture path is nothing, then need to display the description as button text using font color and back color.

this button values are not loaded only once. using button click Addhandler, each button values keeps on changing each time.

The Code i used to display is

Code:
For Each c As Control In Controls
If c.Name = "ItemBtn-" & x Then
c.Text = ButtonText

[Code].....

while i run the program, the image is diplaying in correct button if picture path exist and button that didn't have the picture path is displaying the text.

but the image is not fitting inside the Button. i can see only half of the image. i need a way to make the Image stretched or reduced to fit inside button.