Win64 - Add/delete SSL Certificate binding prompt error "Parameter is incorrect"

[islatislat]

This is a known pitfall when moving HTTP API code from Win32 to Win64. The issue is not IntraWeb itself, but structure alignment and pointer sizes.
On Win64,

Code:

HTTP_SERVICE_CONFIG_SSL_SET

,

Code:

HTTP_SERVICE_CONFIG_SSL_KEY

, and related records must exactly match the Windows API layout, including correct use of

Code:

ULONG_PTR

, padding, and pointer-sized fields. Code that works in Win32 often fails in Win64 if records are declared manually or copied from older examples.
“The parameter is incorrect” usually means one of these:

• Record size (
  
  Code:

  dwLength
  ) is wrong on Win64
  
• A field declared as
  
  Code:

  DWORD
  should be
  
  Code:

  ULONG_PTR
  
  
• Memory passed to
  
  Code:

  HttpSetServiceConfiguration
  is not properly aligned
  
• Cert hash length or pointer is incorrect (must be 20 bytes for SHA-1)
  

In Delphi Win64 you must:

• Use the Windows SDK–correct declarations
  
• Avoid hard-coded sizes
  
• Ensure
  
  Code:

  pSslHash
  points to valid memory and
  
  Code:

  SslHashLength = 20
  
  

Many developers fix this by copying the Win64-safe declarations https://tropical-casino.com/ from recent Delphi RTL or Microsoft headers instead of older IntraWeb samples.
If you want, you can paste your record declarations here and I can point out the exact Win64 mismatch.