Detect DirectX Version: Difference between revisions
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== Safer Example == | == Safer Example == | ||
Just in case if Microsoft decides to modify the key name/version and the detection fails it is safer to simply warn the user but not to exit - in that case use this: | Just in case if Microsoft decides to modify the key name/version (as it doesn't show 1000 on Vista as it should) and the detection fails it is safer to simply warn the user but not to exit - in that case use this: | ||
<highlight-nsis> | <highlight-nsis> | ||
Call GetDXVersion | Call GetDXVersion | ||
Pop $R3 | Pop $R3 | ||
IntCmp $R3 900 +2 0 +2 | IntCmp $R3 900 +2 0 +2 | ||
MessageBox "MB_OK" "Requires DirectX 9.0 or later." | MessageBox "MB_OK" "Requires DirectX 9.0 or later. Please update your DirectX." | ||
</highlight-nsis> | </highlight-nsis> | ||
| Line 50: | Line 50: | ||
[[Category:Other Products Version Detection Functions]] | [[Category:Other Products Version Detection Functions]] | ||
[[Category:DirectX]] | |||
Latest revision as of 06:38, 11 August 2009
| Author: jason379 (talk, contrib) |
Description
This code will return the DirectX version number on the stack, or zero if DirectX is not installed. The return value is an integer concatenating the major and minor version: "801" for version 8.1, "900" for version 9.0.
Example
Here is an example of how it can be used:
Call GetDXVersion Pop $R3 IntCmp $R3 900 +3 0 +3 MessageBox "MB_OK" "Requires DirectX 9.0 or later." Abort
Safer Example
Just in case if Microsoft decides to modify the key name/version (as it doesn't show 1000 on Vista as it should) and the detection fails it is safer to simply warn the user but not to exit - in that case use this:
Call GetDXVersion Pop $R3 IntCmp $R3 900 +2 0 +2 MessageBox "MB_OK" "Requires DirectX 9.0 or later. Please update your DirectX."
The Function
And here is the code:
Function GetDXVersion Push $0 Push $1 ClearErrors ReadRegStr $0 HKLM "Software\Microsoft\DirectX" "Version" IfErrors noDirectX StrCpy $1 $0 2 5 ; get the minor version StrCpy $0 $0 2 2 ; get the major version IntOp $0 $0 * 100 ; $0 = major * 100 + minor IntOp $0 $0 + $1 Goto done noDirectX: StrCpy $0 0 done: Pop $1 Exch $0 FunctionEnd
