msmapi32.ocx - Analyze and How to Fix Errors

★★★★★ Verified File (27.08.2026)

⚠️ Important Notice: ocx - Essential Windows Component for System Stability and Functionality Manually replacing system libraries can brick future Windows updates or cause critical system failures.

Architecture:	32-bit (x86)	Compatible with 32 and 64-bit Windows
Creation date	25.11.2013 05:34:31
File version	6.1.98.39
Antivirus scan	✅ Clean	No viruses detected.
Digital signature	✅ Have signed	File have signature, it is original file.
Hash Integrity	✅ MD5: Verified	File Hash protection is missing.
File size	147.6 kb.	151192 bytes.

Hashes:

MD5: 0c62416c2a8c32bb00b5f327e7f6ca17 ✅
SHA-1: 4ac71b2a1f1d08a4938fcb89042c60d6608125af
SHA-256: 185f754fca2d711e1194a5118fa68c72d113cd6cb1ebfa39c86691571c3039a9
SHA-512: 4a9c6d0ea2a17eea94eaae7a2d74ef6cbddf55fc591f113d599378f0890baa7c933c16e0911c3108e65ef3b723f9d372750a44ed9c9b03d933c74f4ffc7e4a0c

Digital file signature `msmapi32.ocx` ✅

Publisher: Microsoft Corporation
Issuer: Microsoft Code Signing PCA
Encryption algorithm: SHA1
Time stamp: Nov 25 14:27:45 2013 GMT

✅ This file is compatible with 32-bit Windows and can run on ✅ 64-bit Windows (via the WOW64 subsystem).

MSMAPI32.OCX Overview and Error Fixes

What is MSMAPI32.OCX?

Type: ActiveX Control (OLE Custom Control).
Purpose: Provides Microsoft Messaging API (MAPI) support.
Function: Allows Visual Basic 6.0 applications to send/receive email.
Component: Part of Microsoft Visual Basic 6.0 Common Controls.

Standard File Locations

64-bit Windows: C:\Windows\SysWOW64\
32-bit Windows: C:\Windows\System32\

How to Fix MSMAPI32.OCX Errors (Without Downloading)

Errors usually happen because the file is unregistered or corrupted. You can fix this using built-in Windows tools.

Method 1: Re-register the File via Command Prompt

Press the Windows Key.
Type cmd.
Right-click Command Prompt.
Select Run as administrator.
Type the correct command below based on your system.
Press Enter.

For 64-bit Windows:

regsvr32 %systemroot%\SysWOW64\msmapi32.ocx

For 32-bit Windows:

regsvr32 %systemroot%\System32\msmapi32.ocx

Method 2: Run SFC and DISM Scan

If the file is corrupted, Windows can repair it using cached system copies.

Open Command Prompt as administrator.

Run the DISM tool first:

DISM.exe /Online /Cleanup-image /Restorehealth

Run the System File Checker:
```
sfc /scannow
```
Restart your computer.

Method 3: Copy from Existing Software

If the file is completely missing, do not use third-party download sites. You likely already have it on your drive from older Microsoft Office or Visual Studio installations.

Open File Explorer (Win + E).
Click on This PC.
In the top-right search bar, type msmapi32.ocx.
If found in a backup or installer folder, copy it.
Paste it into your standard folder (SysWOW64 or System32).
Follow Method 1 to register it.

📊 Diagnostics Tool: Verify Your `msmapi32.ocx` File

Worried that the file on your PC has been modified by malware? Drop it into the form below. Our script will verify its file size, cryptographic hash (MD5/SHA-1), and check for a valid Microsoft digital signature.

Connected files:
KERNEL32.dll
├── USER32.dll
├── ole32.dll
├── ADVAPI32.dll
├── OLEAUT32.dll
└── GDI32.dll

Similar files:
️msmapi32.dll
Microsoft Corporation