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I define resource IDs as below: #define _RESOURCE_ID 150 #define IDR_OPBUTTON _RESOURCE_ID + 10

When I use below code to change the text of button, it doesn't work: SetDlgItemText(hWnd, IDR_OPBUTTON, _T("-"));
But if I give it a number directly, it does work: #define IDR_OPBUTTON 160

Can anybody tell me why? Thanks in advance!
Also, I tried function GetDlgItemInt for a textbox, it has the same behavior.

sky
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1 Answers1

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Did you try to put parenthesis? 

#define IDR_OPBUTTON (_RESOURCE_ID + 10)
sergiol
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